Last Updated on November 30, 2024 by XAM CONTENT
Hello students, we are providing case study questions for class 7 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 7 science. In this article, you will find case study questions for cbse class 7 science chapter 11 Light.
| Chapter | Light |
| Type of Questions | Case Study Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 7 |
| Subject | Science |
| Useful for | Class 7 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 7 Science Chapterwise Case Study |
Case Study Questions on Light
Questions
Question 1:
Read the given passage below and answer the question:
A solar cooker is a device which uses the sun rays to heat and cook food. It is a type of solar thermal collector. It has a concave mirror which “gathers” and traps the Sun’s heat energy. Many solar cookers currently in use are relatively inexpensive, low-tech device because they use no fuel and cost nothing to operate. The use of solar cooker is being promoted worldwide in order to help reduce fuel costs and air pollution. This will also help to slow down deforestation and desertification.
Q. 1. Sun is a natural source of light. Choose the option which is a natural source of light?
(a) moon and stars
(b) stars and lighting
(c) fire and stars
(d) moon and tubelight
Difficulty Level: Easy
Ans. Option (b) is correct.
Explanation: A natural source of light is light that occurs naturally without the involvement of humans. Sun, stars, lighting are some of the examples of natural source of light.
Q. 2. Concave mirrors are ________mirrors which are curved _________. Â
(a) plane, upward
(b) spherical, upward
(c) plane, inward
(d) spherical, inward
Difficulty Level: Medium
Ans. Option (d) is correct.
Explanation: A concave mirror is a spherical mirror. A concave mirror has a reflective surface that is curved inward and away from the light source.
Q. 3. In which two conditions the solar cooker will be less useful?
(a) in cloudy weather
(b) near the poles
(c) on rainy day
(d) All of these
Difficulty Level: Easy
Ans. Option (d) is correct.
Explanation: Cooking with solar cookers requires sunlight so it will be difficult to use in cloudy weather, on rainy day and near the poles, where the Sun appears low in the sky.
Q. 4. Why a concave mirror is used in a solar cooker?
Difficulty Level: Medium
Ans. A concave mirror converges the rays coming from a far away distance, at a point. In a solar cooker,
all the rays falling on a concave mirror will be concentrated on the food which will increase the intensity of the heat and cook the food faster.
Q. 5. What will happen if we use
(a) a plane mirror
(b) a convex mirror
Difficulty Level: Hard
Ans. (a) If we use a plane mirror in a solar cooker then it will not concentrate the sun rays at point as the concave mirror does. Thus, the maximum heat will not be achieved to cook the food.
(b) A convex cannot be used as it will diverge away the sun rays falling on it and no heat will be received at a point so food will not cook.
Also check
- Wastewater Story Class 7 Case Study Questions Science Chapter 13
- Forests Our Lifelines Class 7 Case Study Questions Science Chapter 12
- Light Class 7 Case Study Questions Science Chapter 11
- Electric Currents and Its Effects Class 7 Case Study Questions Science Chapter 10
- Motion and Time Class 7 Case Study Questions Science Chapter 9
- Reproduction in Plants Class 7 Case Study Questions Science Chapter 8
- Transpirations in Animals and Plants Class 7 Case Study Questions Science Chapter 7
- Respiration in Organisms Class 7 Case Study Questions Science Chapter 6
- Physical and Chemical Changes Class 7 Case Study Questions Science Chapter 5
- Acids Bases and Salts Class 7 Case Study Questions Science Chapter 4
- Heat Class 7 Case Study Questions Science Chapter 3
- Nutrition in Animals Class 7 Case Study Questions Science Chapter 2
- Nutrition in Plants Class 7 Case Study Questions Science Chapter 1
Topics from which case study questions may be asked
- Demonstrate light travels in a straight line.
- Define convex and concave mirrors.
- Define convex and concave lenses.
- Discuss the reflection of light.
- Describe different types of images formed by lenses.
- Explain sunlight is made up of different colours.
Light is very important for us. We can see the world around us because of light. Plants make their food with the help of light.
When light falls on a shiny surface, such as mirror, it changes its direction is called reflection of light.
For further practice on case study questions related to Class 7 Science Chapter 11 Light, we recommend exploring the link given below.
Frequently Asked Questions (FAQs) on Light Case Study Questions
Q1: What are case study questions for CBSE examinations?
A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.
Q2: Why are case study questions important for understanding class 7 science chapters?
A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.
Q3: How do case study questions differ from other question types?
A3: Unlike direct questions that test specific knowledge, case study questions involve analyzing a scenario, understanding the context, and applying various scientific concepts to answer the questions. They test higher-order thinking skills such as analysis, synthesis, and evaluation.
Q4: Are there any resources available online for students to practice case study questions on class 7 science chapters for CBSE exams?
A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our website to access these questions and enhance your learning experience. There is another website Physics Gurukul that offers a large collection of case study questions.
Q5: How can students effectively prepare for case study questions on Light for CBSE exams?
A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.
Q6: How can teachers incorporate case study questions on Light class 7 science into classroom teaching?
A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of light.
Q7: What steps should I follow to correctly answer case study questions?
A7: Follow these steps:
Read the case study carefully. Understand the scenario and the information provided.
Identify the key concepts. Determine which scientific principles or concepts are relevant to the case study.
Analyze the information. Break down the information, identify relationships, and note any data or facts given.
Answer the questions. Apply your knowledge to answer the questions, ensuring that your responses are based on the case study and the relevant scientific concepts.
Q8: What should I check when reading a case study?
A8: Check the following:
Context and background: Understand the setting and context of the case study.
Key facts and data: Identify important details, data points, and observations mentioned.
Relevant concepts: Recognize which scientific concepts and principles are applicable.
Questions asked: Carefully read each question to understand what is being asked and how it relates to the case study.
Q9: What are common mistakes to avoid when answering case study questions?
A9: Common mistakes include:
Not reading the case study carefully: Missing important details and context.
Ignoring key concepts: Failing to identify and apply relevant scientific principles.
Superficial analysis: Providing answers that lack depth and do not fully address the questions.
Making assumptions: Adding information not provided in the case study or making unsupported assumptions.
Q10: How can I ensure my answers are thorough and well-structured?
A10: Ensure your answers are thorough and well-structured by:
Organizing your thoughts: Structure your answer logically with a clear introduction, body, and conclusion.
Using evidence: Support your answers with specific information from the case study.
Applying relevant concepts: Clearly explain how scientific principles relate to the case study.
Reviewing your answers: Check for completeness and accuracy, ensuring all parts of the question are addressed.
Q11: What are the important keywords from the chapter “Light”?
A11: Important keywords from the chapter “Light” are given below:
Lens: A piece of transparent material with curved sides.
Mirror: A surface mostly of glass which reflects the light and creates an image.
Prism: A three-dimensional shape with flat sides.
Erect image: A straight and upright image.
Virtual image: The image that cannot be obtained on a screen.
Real image: The image can be obtained on a screen.
Concave: With a surface that curves inwards like the interior of a sphere.
Convex: With a surface that curves like the exterior of a sphere.
