case study for class 9th science

Class 9 Science Case Study Questions PDF Download

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Class 9 Science Case Study Questions play a crucial role in the field of science education as they provide real-life scenarios for students to analyze, apply their knowledge, and develop problem-solving skills. This article aims to present a comprehensive collection of case study questions for Class 9 Science , covering various topics and concepts.

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CBSE Class 9 Science Exam will have a set of questions based on case studies in the form of MCQs. The CBSE Class 9 Science Question Bank on Case Studies, provided in this article, can be very helpful to understand the new format of questions. Share this link with your friends.

If you want to want to prepare all the tough, tricky & difficult questions for your upcoming exams, this is where you should hang out.  CBSE Case Study Questions for Class 9  will provide you with detailed, latest, comprehensive & confidence-inspiring solutions to the maximum number of Case Study Questions covering all the topics from your  NCERT Text Books !

Table of Contents

CBSE Class 9th SCIENCE Chapterwise Case Study Question & Solution

Case study questions provide students with real-life scenarios that require critical thinking and application of scientific concepts. They help students understand the practical application of scientific principles and develop problem-solving skills in various scientific disciplines.

Chapterwise Case Study Questions for Class 9 Science

Inboard exams, students will find the questions based on assertion and reasoning. Also, there will be a few questions based on case studies. In that, a paragraph will be given, and then the MCQ questions based on it will be asked. For Science subjects, there would be 5 case-based sub-part questions, wherein a student has to attempt 4 sub-part questions.

• Case Study Questions for Chapter 1 Matter in Our Surroundings
• Case Study Questions for Chapter 2 Is Matter Around Us Pure?
• Case Study Questions for Chapter 3 Atoms and Molecules
• Case Study Questions for Chapter 4 Structure of Atom
• Case Study Questions for Chapter 5 The Fundamental Unit of Life
• Case Study Questions for Chapter 6 Tissues
• Case Study Questions for Chapter 7 Diversity in Living Organisms
• Case Study Questions for Chapter 8 Motion
• Case Study Questions for Chapter 9 Force and Laws of Motion
• Case Study Questions for Chapter 10 Gravitation
• Case Study Questions for Chapter 11 Work and Energy
• Case Study Questions for Chapter 12 Sound
• Case Study Questions for Chapter 13 Why do we Fall ill
• Case Study Questions for Chapter 14 Natural Resources
• Case Study Questions for Chapter 15 Improvement in Food Resources

The above  Case studies for Class 9 Science  will help you to boost your scores as Case Study questions have been coming in your examinations. These CBSE Class 9 Science Case Studies have been developed by experienced teachers of schools.studyrate.in for the benefit of Class 10 students.

Class 9 Maths Case Study Questions

Benefits of Case Studies in Science Education

Case studies offer several advantages over traditional teaching methods. Here are some key benefits:

• Real-World Application : Case studies present authentic scenarios, enabling students to understand how scientific concepts are applied in real-life situations.
• Critical Thinking : Analyzing case studies requires students to think critically, make connections, and apply scientific knowledge to solve problems.
• Interdisciplinary Approach : Case studies often involve multiple scientific disciplines, fostering an interdisciplinary understanding of complex issues.
• Engagement and Active Learning : Case studies actively engage students in the learning process, promoting active participation, discussion, and collaboration.
• Skill Development : Case studies develop essential skills such as analytical thinking, problem-solving, and effective communication of scientific concepts.

Importance of Practicing Case Study Questions

Practicing case study questions is crucial for Class 9 Science students to enhance their understanding and application of scientific concepts. Here’s why it is important:

• Application of Knowledge : Case studies allow students to apply their theoretical knowledge to practical situations, bridging the gap between theory and real-world scenarios.
• Developing Analytical Skills : Analyzing case studies improves students’ ability to identify relevant information, make connections, and draw logical conclusions.
• Problem-Solving Skills : Case studies present complex problems that require students to think critically and develop effective problem-solving strategies.
• Enhanced Exam Performance : Practicing case study questions familiarizes students with the format and types of questions they may encounter in exams, leading to improved performance.

Subjects Covered in the Case Study Questions for Class 9 Science

The case study questions for Class 9 Science cover the following subjects:

• Motion and Forces
• Light and Reflection
• Electricity
• Matter and Its Properties
• Atoms and Molecules
• Structure of the Atom
• Chemical Reactions
• Cell: The Fundamental Unit of Life
• Diversity in Living Organisms
• Natural Resources

Tips for Approaching Case Study Questions

To tackle case study questions effectively, consider the following tips:

• Read Carefully : Pay close attention to the details provided in the case study, as they hold crucial information for solving the problem.
• Analyze Methodically : Break down the problem into smaller components and analyze each part systematically.
• Apply Relevant Concepts : Identify the scientific principles relevant to the case study and apply them appropriately.
• Consider Multiple Perspectives : Explore different angles and viewpoints while proposing solutions, taking into account various scientific factors.
• Provide Justifications : Support your answers with scientific explanations and logical reasoning to strengthen your responses.

The Class 9 Science Case Study Questions provided in this article serve as a valuable resource for students seeking to enhance their scientific knowledge and problem-solving skills. By practicing these case studies, students can develop a deeper understanding of scientific concepts and their practical applications. Embrace this opportunity to engage with real-world scenarios and strengthen your scientific acumen.

Q1: Are the Class 9 Science Case Study Questions aligned with the official curriculum?

Yes, the Class 9 Science Case Study Questions presented in this article are aligned with the official curriculum. They cover relevant topics and concepts that students need to study for their exams.

Q2: Can practicing case study questions alone guarantee success in Class 9 Science exams?

Practicing case study questions is an important part of exam preparation, but it should be complemented with a thorough understanding of the subject matter. It is advisable to study the concepts in detail, refer to textbooks, and engage in other learning activities to achieve success in exams.

Q3: Where I Can get Class 9 Science Case Study Questions ?

You can practice Class 9 Science Case Study Questions on schools.studyrate.in for free.

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CBSE Class 9 Science Important Case Study Questions with Answers for Term 2 Exam 2022 (PDF)

Check important case study questions of cbse class 9 science to prepare for the cbse term 2 exam 2022. all these questions have been put together by subject experts..

CBSE Class 9 Term 2 Exam 2022:  Important case based questions for CBSE Class 9 Science are provided here students to prepare for the upcoming Term 2 Exam 2022. All the questions provided below are curated by the subject experts. These questions are really helpful to revise important concepts and prepare the case study questions for the exam. Answers to all questions have been provided for reference. So, students should practice the chapter-wise questions to clearly understand the right way to attempt the case based questions. Download the chapter-wise questions in PDF.

Check some of the important case study questions below:

Q. Read the following and answer the questions :

A student was asked by his teacher to verify the law of conservation of mass in the laboratory. He prepared 5% aqueous solutions of NaCl and Na 2 SO 4 . He mixed 10 mL of both these solutions in a conical flask. He weighed the flask on a balance. He then stirred the flask with a rod and weighed it after sometime. There was no change in mass.

• Was the student able to verify the law of conservation of mass?
• If not, what was the mistake committed by him?
• In your opinion, what he should have done?
• What is the molar mass of Na 2 SO 4 ?
• No, he could not verify the law of conservation of mass in-spite of the fact that there was no change in mass.
• No chemical reaction takes place between NaCl and Na 2 SO 4 . This means that no reaction actually took place in the flask.
• He should have performed the experiment by using aqueous solutions of BaCl 2 and Na 2 SO 4 . A chemical reaction takes place in this case and a white precipitate of BaSO 4 is formed.
• Will the weight of the precipitate be the same as that of the reactants before mixing?
• If not, what she should have done?
• Which law of chemical combination does this support?
• State the law of conservation of mass.
• No, it will not be the same.
• She should have weighed the total contents of the beaker after the reaction and not the precipitate alone.
• It supports the law of conservation of mass.
• Mass can neither be created nor destroyed during a chemical reaction.

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Case Study Questions of Chapter 3 Atoms and Molecules PDF Download

Case study Questions on Class 9 Science Chapter 3  are very important to solve for your exam. Class 9 Science Chapter 3 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Science Chapter 3 Atoms and Molecules

In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Atoms and Molecules Case Study Questions With answers

Here, we have provided case-based/passage-based questions for Class 9 Science  Chapter 3 Atoms and Molecules

Case Study/Passage Based Questions

The knowledge of valencies of various radicals helps us to write the formulae of chemical compounds. The total positive charge on positive ions (cations) is equal to the total negative charge on negative ions (anions) in a molecule. Therefore, in writing the formula of a compound, the positive and negative ions are adjusted in such a way that the total number of positive charges of positive ions (cations) becomes equal to the total number of negative charges of negative ions (anions). There is another simple method for writing the formulae of ionic compounds. In this method, the valencies (or positive or negative charges) of the ions can be ‘crossed over’ to give subscripts. The purpose of crossing over of charges is to find the number of ions required to equalise the number of positive and negative charges.

Element X has two valencies 5 and 3 and Y has valency 2. The elements X and Y are most likely to be respectively (a) copper and sulphur (b) sulphur and iron (c) phosphorus and fluorine (d) nitrogen and iron.

Answer: (d) nitrogen and iron.

The formula of the sulphate of an element X is X 2 (SO 4 ) 3 . The formula of nitride of element X will be (a) X 2 N (b) XN 2 (c) XN (d) X 2 N 3

Answer: (c) XN

The formula of a compound is X 3 Y. The valencies of elements X and Y will be respectively (a) 1 and 3 (b) 3 and 1 (c) 2 and 3 (d) 3 and 2

Answer: (a) 1 and 3

A mole of an atom is a collection of atoms whose total mass is the number of grams equal to the atomic mass. Since an equal number of moles of different elements contain an equal number of atoms it becomes convenient to express the amounts of the elements in terms of moles. A mole represents a definite number of particles viz, atoms, molecules, ions or electrons. This definite number is called the Avogadro number or Avogadro constant which is equal to 6.022 × 1023. Hence a mole represents 6.022 × 1023 particles of the substance. One mole of a substance represents one gram-formula of the substance. One mole of a gas at standard temperature and pressure occupies 22.4 litres.

How many grams of sodium must be taken to get 1 mole of the element? (a) 23 g (b) 35.5 g (c) 63.5 g (d) 46 g

Answer: (a) 23 g

What is the mass in grams of a single atom of chlorine? (Atomic mass of chlorine = 35.5) (a) 6.54 × 10 23 g (b) 5.9 × 10 –23 g (c) 0.0025 g (d) 35.5 g

Answer: (b) 5.9 × 10–23 g

How many number of moles are there in 5.75 g of sodium ? (Atomic mass of sodium = 23) (a) 0.25 (b) 0.5 (c) 1 (d) 2.5

Answer: (a) 0.25

What is the mass in grams of 2.42 mol of zinc? (Atomic mass of Zn = 65.41) (a) 200 g (b) 25 g (c) 85 g (d) 158 g

Answer: (d) 158 g

According to Dalton’s atomic theory, all matter whether an element, a compound, or a mixture is composed of small particles called atoms which can neither be created nor destroyed during a chemical reaction. Dalton’s theory provides a simple explanation for the laws of chemical combination. He used his theory to explain the law of conservation of masses, the law of constant proportions, and the law of multiple proportions, based on various postulates of the theory. Dalton was the first scientist to use the symbols for the elements in a very specific sense. When he used a symbol for an element he also meant a definite quantity of that element, that is one atom of that element.

Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass? (a) Atoms can neither be created nor destroyed. (b) Each element is composed of extremely small particles called atoms. (c) All the atoms of a given element are identical. (d) During chemical combination, atoms of different elements combine in simple ratios.

Answer: (a) Atoms can neither be created nor destroyed.

Which postulate of Dalton’s atomic theory explains law of definite proportions? (a) Atoms of an element do not change during a chemical reaction. (b) An element consists of atoms having fixed mass and the number and kind of atoms in a given compound is fixed. (c) Different elements have different kind of atoms. (d) Atoms are of various kinds

Answer: (b) An element consists of atoms having fixed mass and the number and kind of atoms in a given compound is fixed.

“If 100 g of calcium carbonate (whether in the form of marble or chalk) is decomposed, 56 g of calcium oxide and 44 g of carbon dioxide are formed.” Which law of chemical combination is illustrated by this statement? (a) Law of constant proportions (b) Law of conservation of mass (c) Law of multiple proportions (d) Law of conservation of energy

Answer: (b) Law of conservation of mass

When 5 g calcium is burnt in 2 g oxygen, 7 g of calcium oxide is produced. When 5 g of calcium is burnt in 20 g of oxygen, then also 7 g of calcium oxide is produced. Which law of chemical combination is being followed? (a) Law of conservation of mass (b) Law of multiple proportions (c) Law of constant proportions (d) No law is being followed.

Answer: (c) Law of constant proportions

Hope the information shed above regarding Case Study and Passage Based Questions for Class 9 Science Chapter 3 Atoms and Molecules with Answers Pdf free download has been useful to an extent. If you have any other queries of CBSE Class 9 Science Atoms and Molecules Case Study and Passage Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible

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Class 9th Science - Matter in Our Surroundings Case Study Questions and Answers 2022 - 2023

By QB365 on 09 Sep, 2022

QB365 provides a detailed and simple solution for every Possible Case Study Questions in Class 9th Science Subject - Matter in Our Surroundings, CBSE. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

QB365 - Question Bank Software

Matter in our surroundings case study questions with answer key.

9th Standard CBSE

Final Semester - June 2015

 Case Study 

(ii) Name the brown gas which could be in jar A.

(iii) Which is the colourless gas most likely to be present in jar B ?

(iv) When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment : (a) air is heavier than bromine (b) both air and bromine have the same density (c) bromine is heavier than air (d) bromine cannot be heavier than air because it is going upwards against gravity (v) When a gas jar containing colourless air is kept upside down over a gas jar full of brown-coloured bromine vapour, then after some time, the brown colour of bromine vapour spreads into the upper gas jar making both the gas jars appear brown in colour. Which of the following conclusion obtained from these observations is incorrect ? (a) bromine vapour is made of tiny particles which are moving (b) air is made up of tiny particles which are moving (c) the particles of bromine are moving but those of air are not moving (d) even though bromine vapour is heavier than air, it can move up against gravity

*****************************************

Matter in our surroundings case study questions with answer key answer keys.

(i) (c) diffusion (ii) (a) Bromine vapour (iii) (c) air (iv) (c) bromine is heavier than air (v) (c) the particles of bromine are moving but those of air are not moving

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CBSE Case Based Questions for Class 9 Social Science - Pdf PDF Download

Cbse case study questions for class 9 social science.

Case based questions  are a type of exam question designed to assess the student’s ability to apply information from the Social Science syllabus in a practical situation. These questions typically involve the student being given a brief scenario or case study and then asked to answer questions based on the data provided.

The purpose of case based questions is to test the student's analytical and problem solving skills, as well as their knowledge of the Social Science syllabus. In addition, they allow teachers to assess the student’s ability to think critically and creatively in order to come up with effective solutions. Case based questions also help to ensure that students have a better understanding of how their knowledge can be applied in real-world situations.

Case based questions should be tailored to the specific grade level and topic under consideration. For example, a case-based question for Class 9 Social Science might involve the student analyzing a historical event or analyzing the impact of a government policy. The key is to provide the student with enough information to understand the scenario and formulate an appropriate response.

Case Based Questions For Class 9 History

Case-based questions for Class 9 History are a type of question that is based on a particular case study or event related to a historical event or period. These questions require students to apply their understanding of the historical context and analyze the case study to answer the questions. Case-based questions usually require students to identify the main issues or problems highlighted in the case study, evaluate the different perspectives or opinions presented, and make an informed judgment or conclusion based on the evidence presented. These questions test not only the student's knowledge of historical events but also their critical thinking and analytical skills.

Chapter Wise Case Based Questions for Class 9 History 

Chapter-wise case-based questions for Class 9 History are a set of questions that are based on a specific chapter or topic in the history textbook. These questions are designed to help students apply their understanding of historical events and concepts to specific case studies or scenarios.

The CBSE Class 9 Case Based Questions can be accessed from Chapetrwise Links provided below:

Chapter 1: The French Revolution

• Case Based Questions: The French Revolution

Chapter 2: Socialism in Europe and the Russian Revolution

• Case Based Questions: Socialism in Europe and the Russian Revolution

Chapter 3: Nazism and the Rise of Hitler

• Case Based Questions: Nazism and the Rise of Hitler

Chapter 4: Forest Society and Colonialism

Chapter 5: Pastoralists in the Modern World

Case Based Questions For Class 9 Geography

Case-based questions for Class 9 Geography are a type of question that requires students to apply their understanding of geography concepts and analyze a particular case study related to a geographical phenomenon. These questions often require students to analyze a specific situation or scenario related to a geographical concept or phenomenon and answer the questions based on their understanding of the concept and the given situation.

Chapter Wise Case Based Questions for Class 9 Geography

Chapter-wise case-based questions for Class 9 Geography are a set of questions that are based on a specific chapter or topic in the geography textbook. These questions are designed to help students apply their understanding of geographical concepts and phenomena to specific case studies or scenarios. The CBSE Class 9 Case Based Questions can be accessed from Chapetrwise Links provided below:

Chapter 1: India – Size and Location

• Case Based Questions: India – Size and Location

Chapter 2: Physical Features of India

• Case Based Questions: Physical Features of India

Chapter 3: Drainage

• Case Based Questions: Drainage

Chapter 4: Climate

• Case Based Questions: Climate

Chapter 5: Natural Vegetation and Wildlife

• Case Based Questions: Natural Vegetation and Wildlife

Chapter 6: Population

Case Based Questions For Class 9 Political Science

Case-based questions for Class 9 Political Science are a type of question that requires students to apply their understanding of political science concepts and analyze a particular case study related to a political phenomenon. These questions often require students to analyze a specific situation or scenario related to a political concept or phenomenon and answer the questions based on their understanding of the concept and the given situation.

Chapter Wise Case Based Questions for Class 9 Political Science

Chapter-wise case-based questions for Class 9 Political Science are a set of questions based on specific chapters or topics covered in the political science textbook. These questions are designed to help students apply their understanding of political science concepts to real-world situations and events.

Chapter 1: What is Democracy? Why Democracy?

• Case Based Questions: What is Democracy? Why Democracy?

Chapter 2: Constitutional Design

• Case Based Questions: Constitutional Design

Chapter 3: Electoral Politics

• Case Based Questions: Electoral Politics

Chapter 4: Working of Institutions

• Case Based Questions: Working of Institutions

Chapter 5: Democratic Rights

Case Based Questions For Class 9 Economics

Case-based questions for Class 9 Economics are a type of question that requires students to apply their understanding of economic concepts and analyze a particular case study related to an economic phenomenon. These questions often require students to analyze a specific situation or scenario related to an economic concept or phenomenon and answer the questions based on their understanding of the concept and the given situation.

Chapter Wise Case Based Questions for Class 9 Economics

Chapter-wise case-based questions for Class 9 Economics are a set of questions based on specific chapters or topics covered in the economics textbook. These questions are designed to help students apply their understanding of economic concepts to real-world situations and events.

Chapter 1: The Story of Village Palampur

• Case Based Questions: The Story of Village Palampur

Chapter 2: People as Resource

• Case Based Questions: People as Resource

Chapter 3: Poverty as a Challenge

• Case Based Questions: Poverty as a Challenge

Chapter 4: Food Security in India

Weightage of Case Based Questions in Class 9 Social Science

Why are Case Study Questions important in Social Science Class 9?

• Enhance critical thinking:  Case study questions require students to analyze a real-life scenario and think critically to identify the problem and come up with possible solutions. This enhances their critical thinking and problem-solving skills.
• Apply theoretical concepts:  Case study questions allow students to apply theoretical concepts that they have learned in the classroom to real-life situations. This helps them to understand the practical application of the concepts and reinforces their learning.
• Develop decision-making skills:  Case study questions challenge students to make decisions based on the information provided in the scenario. This helps them to develop their decision-making skills and learn how to make informed decisions.
• Improve communication skills:  Case study questions often require students to present their findings and recommendations in written or oral form. This helps them to improve their communication skills and learn how to present their ideas effectively.
• Enhance teamwork skills:  Case study questions can also be done in groups, which helps students to develop teamwork skills and learn how to work collaboratively to solve problems.

In summary, case study questions are important in Class 9 because they enhance critical thinking, apply theoretical concepts, develop decision-making skills, improve communication skills, and enhance teamwork skills. They provide a practical and engaging way for students to learn and apply their knowledge and skills to real-life situations.

Class 9 Social Science Curriculum at Glance

The Class 9 Social Science curriculum in India covers a wide range of topics and concepts. Here is a brief overview of the Social Science curriculum at a glance:

• History:  The History section includes topics such as the French Revolution, Nazism and the rise of Hitler, socialism in Europe and the Russian Revolution, and the Indian National Movement.
• Geography:  The Geography section includes topics such as India-Size and Location, Physical Features of India, Drainage, Climate, Natural Vegetation and Wildlife, Population, and Human Resource.
• Political Science:  The Political Science section includes topics such as Democracy in the Contemporary World, Constitutional Design, Electoral Politics, Working of Institutions, and Democratic Rights.
• Economics:  The Economics section includes topics such as The Story of Village Palampur, People as Resource, Poverty as a Challenge, Food Security in India, and Globalisation and the Indian Economy.

The Class 9 Social Science curriculum is designed to provide a strong foundation in social sciences and prepare students for higher education in the field. The curriculum is structured to develop critical thinking, problem-solving, and analytical skills, and to promote the application of social science concepts in real-life situations. The curriculum is also designed to help students understand the socio-economic and political structures of India and the world and prepare them for active participation in society.

Students can also access Case Based Questions of all subjects of CBSE Class 9

• Case Based Questions for Class 9 Maths
• Case Based Questions for Class 9 Science
• Case Based Questions for Class 9 English
• Case Based Questions for Class 9 Hindi
• Case Based Questions for Class 9 Sanskrit

Frequently Asked Questions (FAQs) on Case Based Questions for Class 9 Social Science

What are case-based questions in social science.

Case-based questions in social science are problem-solving tasks that require students to apply their knowledge and understanding of social science concepts and theories to real-world situations or scenarios.

How are case-based questions different from traditional social science questions?

Traditional social science questions typically focus on testing students' knowledge of specific facts, concepts, and theories. Case-based questions, on the other hand, require students to use their knowledge and understanding to analyze and interpret real-world situations and make informed decisions.

What are some common types of case-based questions in class 9 social science?

Common types of case-based questions in class 9 social science include analyzing historical events, interpreting data and statistics, and evaluating the impact of social policies and programs.

How can students prepare for case-based questions in social science?

To prepare for case-based questions in social science, students should practice analyzing real-world scenarios and interpreting data and statistics. They should also work on developing their critical thinking and problem-solving skills.

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Class 9 Social Science Case Study Questions

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If you’re seeking Class 9 Social Science Case Study Questions, you’ve come to the correct spot. Students can use Class 9 Social Science Case Study Questions to help them answer a variety of questions about the Class 9 Social Science case study.

The CBSE Board has included case study questions in Class 9 Social Science examination pattern. As a result, it becomes an indispensable study tool.

The need for a student-friendly app to explain and facilitate the understanding of the social sciences subject has been felt for a long. Especially for students who do not have a strong foundation in Class 9 Social Science. With myCBSEguide , class 9 social science students now have a place where they can find resources that are student-friendly, interesting and easy to understand.

Class 9 Social Science Case Study questions are intended to assess student’s abilities to apply their learning to practical scenarios. You’ll need to employ your critical thinking and problem-solving skills to come up with the best solution. Class 9 Social Science case study questions are designed to test your knowledge and help you improve your skills.

Class 9 Social Science Case Study Questions Samples

myCBSEguide has identified the essential themes connected to CBSE case study questions for Class 9 Social Science that every student should be aware of following a comprehensive examination of CBSE Sample Papers and Marking Scheme. Students in Class 9 Social Science will benefit from this information in understanding the changes in the Class 9 Social Science. For a better understanding and analysis, students should refer to the example of Class 9 Social Science case study questions attached below:

Class 9 Social Science Case Study Question 1

Read the source given below and answer the questions that follow: On the morning of 14 July 1789, the city of Paris was in a state of alarm. The king had commanded troops to move into the city. Rumours spread that he would soon order the army to open fire upon the citizens. Some 7,000 men and women gathered in front of the town hall and decided to form a peoples’ militia. They broke into a number of government buildings in search of arms. Finally, a group of several hundred people marched towards the eastern part of the city and stormed the fortress-prison, the Bastille, where they hoped to find hoarded ammunition. In the armed fight that followed, the commander of the Bastille was killed and the prisoners released – though there were only seven of them. Yet the Bastille was hated by all because it stood for the despotic power of the king. The fortress was demolished and its stone fragments were sold in the markets to all those who wished to keep a souvenir of its destruction. The days that followed saw more rioting both in Paris and the countryside. Most people were protesting against the high price of bread. Much later, when historians looked back upon this time, they saw it as the beginning of a chain of events that ultimately led to the execution of the king in France, though most people at the time did not anticipate this outcome. Answer the following MCQs by choosing the most appropriate option:

On 14th July, 1789 the people of the ________ estate attacked the Bastille prison and freed all the prisoners signalling the start of the _________.

• first, civil war
• fourth, Russian war
• second, movement
• third, revolution

Which of the following statement is incorrect?

• The Bastille was the fortress-prison.
• The Bastille stood for the democratic power of the king.
• On the morning of 14 July 1789, the people of Paris stormed Bastille
• All are correct

In the question given below, there are two statements marked as Assertion (A) and Reason (R). Read the statements and chose the correct option: Assertion (A): The people of France storm the Bastille. Reason (R): They were hopeful to find King Louis XIV and commander of the Bastille there.

• Both A and R are correct and R is the correct explanation of A.
• Both A and R are correct but R is not the correct explanation of A.
• A is correct but R is wrong.
• Both A and R are wrong.

What was the immediate cause of rioting in Paris?

• Atrocities by the commander
• The high price of bread
• The killing of women and children
• All of these

Answer Key:

• (d) third, revolution
• (b) The Bastille stood for the democratic power of the king. [Explanation: The Bastille stood for the despotic power of the king.]
• (c) A is correct but R is wrong. [Explanation: The people of France stormed the fortress-prison, the Bastille because they were hopeful to find hoarded ammunition there.]
• (b) high price of bread

Class 9Social Science Case Study Question 2

Read the extracts and answer the question that follows:

The Himalayas, geologically young and structurally fold mountains stretch over the Himalayas northern borders of India. These mountain ranges run in a west-east direction from the Indus to the Brahmaputra. The Himalayas represent the loftiest and one of the most rugged mountain barriers of the world. They form an arc, which covers a distance of about 2,400 Km. Their width varies from 400 Km in Kashmir to 150 Km in Arunachal Pradesh. The altitudinal variations are greater in the eastern half than those in the western half. The Himalaya consists of three parallel ranges in its longitudinal extent. A number of valleys lie between these ranges. The northern most range is known as the Great or Inner Himalayas. It is the most continuous range consisting of the loftiest peaks with an average height of 6,000 metres. It contains all the prominent Himalayan peaks.

The folds of Great Himalayas are asymmetrical in nature. The core of this part of Himalayas is composed of granite. It is perennially snow bound, and a number of glaciers descend from this range.

• The Great or Inner Himalayas is also known as?
• Give two features of the folds of Great Himalayas.
• Give two features of the Inner Himalayas.
• The Great or Inner Himalayas is also known as the ‘Himadri’.
• (Any two relevant points)
• The folds of Great Himalayas are asymmetrical in nature.
• The core of this part of Himalayas is composed of granite.
• It is perennially snow bound, and a number of glaciers descend from this range.
• Features of the Inner Himalayas:
• It is the most continuous range consisting of the loftiest peaks with an average height of 6,000 metres.
• It contains all the prominent Himalayan peaks.  

Class 9 Social Science Case Study Question 3

Read the source given below and answer the questions that follow: In Pakistan, General Pervez Musharraf led a military coup in October 1999. He overthrew a democratically elected government and declared himself the ‘Chief Executive’ of the country. Later he changed his designation to President and in 2002 held a referendum in the country that granted him a five-year extension. Pakistani media, human rights organisations and democracy activists said that the referendum was based on malpractices and fraud. In August 2002 he issued a ‘Legal Framework Order’ that amended the Constitution of Pakistan. According to this Order, the President can dismiss the national and provincial assemblies. The work of the civilian cabinet is supervised by a National Security Council which is dominated by military officers. After passing this law, elections were held to the national and provincial assemblies. So Pakistan has had elections, elected representatives have some powers. But the final power rested with military officers and General Musharraf himself. Clearly, there are many reasons why Pakistan under General Musharraf should not be called a democracy. People may have elected their representatives to the national and provincial assemblies but those elected representatives were not really the rulers. They cannot take the final decisions. The power to take final decision rested with army officials and with General Musharraf, and none of them were elected by the people. This happens in many dictatorships and monarchies. They formally have an elected parliament and government but the real power is with those who are not elected. In a few countries, the real power was with some external powers and not with locally elected representatives. This cannot be called people’s rule. Answer the following MCQs by choosing the most appropriate option:

What is the meaning of Referendum?

• Direct vote in which the entire electorate is asked to either accept or reject a particular proposal
• A form of government in which the rulers are elected by the people
• A system where the majority or elected representatives are allowed to take decisions on behalf of all the people

In the question given below, there are two statements marked as Assertion (A) and Reason (R). Read the statements and chose the correct option: Assertion (A): Pakistan not considered a democratic country even after having elections Reason (R): Despite elections to the national and provincial assemblies, the final powers rested with General Musharraf and military officers.

• Both A and R are true and R is the correct explanation of A.
• Both A and R are true but R is not the correct explanation of A.
• A is wrong but R is correct.

After the passage of the ________, elections were held to the national and state assemblies.

• Military rule
• Legal Framework Order
• Both (b) and (c)

Does the given source explain the significance of which feature of democracy?

• Democracy must be based on a free and fair election
• In a democracy, the final decision-making power must rest with those elected by the people
• In a democracy, each adult citizen must have one vote
• Democratic government rules within limits set by constitutional law and citizens’ rights
• (a) Direct vote in which the entire electorate is asked to either accept or reject a particular proposal
• (a) Both A and R are true and R is the correct explanation of A.
• (c) Legal Framework Order
• (b) In a democracy, the final decision-making power must rest with those elected by the people

Steps to Master Class 9 Social Science Case Study Questions

Class 9 Social Science case study questions can be daunting, but there are some strategies you can use to ace them. There is no one-size-fits-all answer to Class 9 social science case study questions. The best way to solve a social science case study will vary depending on the specific case in question. However, there are some general tips that can be followed in order to improve your chances of success while answering class 9 social science case study questions.

• First, make sure to read the question carefully and understand what is being asked. It is often helpful to re-read the question after gathering all of your information.
• Next, organize your thoughts and create an outline of your answer. This will help you to stay on track and include all relevant information.
• Finally, write your answer in a clear and concise manner.

Class 9 Social Science Content Structure

Class 9 social science content is divided into four parts: History, Geography, Economics and Political Science. Each part is further divided into smaller themes/chapters.

Each of these topics given in Class 9 Social Science is important in its own right, and together they provide a comprehensive overview that affect our world today. The content is structured in such a way as to provide Class 9 Social Science students with a broad understanding of each issue, while also allowing them to focus on specific areas that are of particular interest to Class 9 Social Science students.

Class 9 Social Science COURSE CONTENT 

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Case Study Questions Class 9 Science Work and Energy

Case study questions class 9 science chapter 11 work and energy.

CBSE Class 9 Case Study Questions Science Work and Energy. Important Case Study Questions for Class 9 Exam. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Work and Energy.

At Case Study Questions there will given a Paragraph. In where some Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks or 4 marks.

CBSE Case Study Questions Class 9 Science – Work and Energy

(1 ) Work done by force acting on an object is equal to the magnitude of the force multiplied by the distance moved in the direction of the force. Work has only magnitude and no direction. Work done is negative when the force acts opposite to the direction of displacement. Work done is positive when the force is in the direction of displacement.The unit of work is newton-metre (N m)or joule (J).

(i) Work done is

(a) Scalar quantity

(b) Vector quantity

(c) Tensor quantity

(d) None of these

(ii) When force acts against the direction of displacement then work done will be

(a) positive

(b) negative

(c) both a and b can possible

(iii) SI unit of work is

(a) Joule(J)

(b) Newton meter(N-m)

(c) both a and b

(iv)You are lifting stone from floor. Work is done by theforce exerted by you on the stone. Theobject moves upwards. The force youexerted is in the direction ofdisplacement. However, there is theforce of gravity acting on the object. Which one of these forces is doingpositive work?

 Which one is doing negative work?

(v) Define 1J of work.

Answer key-1

(iv) Here work done by you is positive work as work is being done in the direction of displacement unlike in case of gravitational force which acts in downward direction against the direction of displacement which is in upward direction.

(v) When 1 Newton of force acts on body and body displaces from its position by 1 meter then the work done is said to be 1 joule (J).

(2) A moving object can do work. An object moving faster can do more work than an identical object moving relatively slow. A moving bullet, blowing wind, a rotating wheel, a speeding stone can do work. How does a bullet pierce the target? How does the wind move the blades of a windmill? Objects in motion possess energy. We call this energy kinetic energy.

Thus, the kinetic energy possessed by an object of mass, m and moving with a uniform velocity, v is

KE = ½ *mv 2

The energy possessed by an object is thus measured in terms of its capacity of doing work. The unit of energy is, therefore, the same as that of work, that is, joule (J).

(i) Energy possessed by body which is in motion is called

(a) Potential energy

(b) Kinetic energy

(c) Nuclear energy

(ii) Which of the following has same unit?

(a) Potential energy and Force

(b) Kinetic energy and work

(c) Both a and b

(iii) Kinetic energy depends

(a) Inversely on velocity of body

(b) Directly on square of velocity of body

(c) Directly on  velocity of body

(iv) Define kinetic energy of body. Give its SI unit

(v) Is kinetic energy scalar or vector? Justify your answer

Answer key-2

(iv) Energy possessed by object due to its motion is called as kinetic energy. Its SI unit is N-m or Joule(J).

(v) kinetic energy is scalar quantity as it is a work done and work done is scalar quantity hence kinetic energy is also scalar quantity and doesn’t have any direction.

(3) Lift an object through a certain height. The object can now do work. It begins to fall when released. This implies that it has acquired some energy. If raised to a greater height it can do more work and hence possesses more energy. From where did it get the energy? In the above situations, the energy gets stored due to the work done on the object. The energy transferred to an object is storedas potential energy if it is not used to cause a change in the velocity or speed of the object.An object increases its energy when raisedthrough a height. This is because work isdone on it against gravity while it is being raised. The energy present in such an objectis the gravitational potential energy.The gravitational potential energy of anobject at a point above the ground is definedas the work done in raising it from the ground by height h

to that point against gravity.Let the work done on the object against gravity beW. That is,

work done, W = force × displacement

Therefore potential energy (PE)= mg*h.

(i) Energy possessed by body due to its position is called

(ii) SI unit of potential energy is

(iii)You do work while winding the key of a toy car. The energy transferred to the spring inside is stored as

(iv)Find the energy possessed by an object of mass 5kg when it is at a height of 10 m above the ground. Given, g = 9.8 m/s 2 .

(v)Find the work done by Gravity on an object of mass 5 kg which moves from height 10m to ground when it is released from height of 10 m. Given, g = 9.8 m/s 2 .

Answer key-3

(iv) we have potential energy as

=5 ×9.8 ×10

(v) work done, W = force × displacement

= 5 ×9.8 ×10

(4) The form of energy can be changed from one form to another. What happens to the totalenergy of a system during or after the process?Whenever energy gets transformed, the totalenergy remains unchanged. This is the law ofconservation of energy. According to this law, energy can only be converted from one form to another it can neither be created nor destroyed. The total energy before and after the transformation remains the same.The lawof conservation of energy is valid inall situations and for all kinds of transformations. Thus during motion the sum of the potential energy and kinetic energy of the object would be the same at all points. That is, potential energy + kinetic energy = constant.Andcalled as mechanical energy.

(i) Which of the energy conversion occur in electric iron?

(a) Electric energy converted into heat energy

(b) Electric energy converted into light energy

(c) Heat energy converted into electrical energy

(ii) When ball drops from height which of the energy conversion takes place

(a) Gravitational potential energy converted into kinetic energy

(b) Kinetic energy converted into Gravitational potential  energy

(iii) When ball is thrown vertically upward which of the following quantity remains constant?

(c) Potential energy

(iv) State law of conservation of energy.

(v) In hydroelectric power plant which energy conversion happens?

Answer key-4

(iv) This is the law ofconservation of energy. According to this law,energy can only be converted from one form to another it can neither be created nor destroyed. The total energy before and after the transformation remains the same.

(v)  In hydroelectric power plant potential energy of water reservoir is converted into electric energy.

(5 ) A more powerful vehiclewould complete a journey in a shorter timethan a less powerful one. We talk of the powerof machines like motorbikes and motorcars.The speed with which these vehicles changeenergy or do work is a basis for theirclassification. Power measures the speed ofwork done, that is, how fast or slow work isdone. Power is defined as the rate of doingwork or the rate of transfer of energy. If anagent does a work W in time t, then power isgiven by

P= work/time

P= W/T. The unit of power is watt.

(i) The rate of doing work is defined as

(ii) Total energy consumed divided by total time taken is called as

(a) Average power

(b) Instantaneous power

(iii) Let A and B having same weight start climbing the rope and reach height of 10m. Let A takes 10sec while B takes 12sec then work done

(a) By both will be same

(b) By A is more than work done by B

(c) By B is more than work done by A

(iv) Define 1 Watt of power

(v) An electric bulb of 20W is used for 5h per day. Calculate the ‘units’ of energy consumed in one day by the bulb.

Answer key-5

(iv) A power is said to be 1 watt when 1 joule of work is done within 1 second of time.

(v) Power of electric bulb = 20 W

Time used, t = 5 h

Energy = power × time taken

= 0.02kW × 5 h

= 0.10 kW h

= 0.10‘units’.

The energy consumed by the bulb 0.10 units

Jaru mitaya

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