Our Environment Class 10 Case Study Questions Science Chapter 14

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Last Updated on April 15, 2025 by XAM CONTENT

Hello students, we are providing case study questions for class 10 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 10 science. In this article, you will find case study questions for cbse class 10 science chapter 13 Our Environment.

Chapter	Our Environment
Type of Questions	Case Study Questions
Nature of Questions	Competency Based Questions
Board	CBSE
Class	10
Subject	Science
Useful for	Class 10 Studying Students
Answers provided	Yes
Difficulty level	Mentioned
Important Link	Class 10 Science Chapterwise Case Study

Customised Study Materials for Teachers, Schools and Coaching Institute

Table of Contents

Case Study Questions on Our Environment

Questions

Question 1:

Read the following and answer the questions given below:

In a grassland ecosystem, plants use sunlight to prepare food through photosynthesis. Grass is eaten by grasshoppers, which are consumed by frogs. The frogs are then eaten by snakes. This chain of consumption forms a food chain, and each level of consumers represents a trophic level. The energy available to each trophic level decreases due to the 10% law, where only 10% of energy is passed on, and the rest is lost as heat.

Q1. What is the source of energy for the food chain mentioned?
(a) Frogs
(b) Grass
(c) Sunlight
(d) Snakes

Q2. How much energy is transferred from grass to frogs if grass gets 1000 J?
(a) 100 J
(b) 10 J
(c) 1 J
(d) 0.1 J

Q3. What is the trophic level of snakes in this food chain?
(a) First
(b) Second
(c) Third
(d) Fourth

Q4. The 10% law explains:
(a) Energy increases at each trophic level
(b) All energy is passed to next level
(c) Only 10% of energy is passed to the next trophic level
(d) 90% of energy is passed to the next level

Answers:
Q1. (c)
Q2. (b)
Q3. (d)
Q4. (c)

Question 2:

Waste generated by households, factories, and agriculture can be biodegradable or non-biodegradable. Biodegradable waste like vegetable peels, paper, and cow dung is broken down naturally by microorganisms. Non-biodegradable waste such as plastic, glass, and synthetic chemicals do not decompose easily, and their accumulation causes pollution. Improper disposal of non-biodegradable waste harms the soil, air, and water and affects all organisms in the food chain.

Q1. Which of the following is a non-biodegradable waste?
(a) Fruit peels
(b) Paper
(c) Cow dung
(d) Plastic

Q2. What happens to biodegradable waste in nature?
(a) It pollutes the environment permanently
(b) It is broken down by decomposers
(c) It turns into fossil fuels
(d) It forms toxic gases

Q3. Which of the following is not an effect of non-biodegradable waste?
(a) Soil infertility
(b) Ozone layer formation
(c) Water pollution
(d) Harm to aquatic life

Q4. The best way to manage biodegradable waste is:
(a) Incineration
(b) Composting
(c) Dumping in rivers
(d) Burning in open fields

Answers:
Q1. (d)
Q2. (b)
Q3. (b)
Q4. (b)

Question 3:

The ozone layer protects life on Earth by absorbing harmful ultraviolet (UV) radiation from the Sun. However, human activities such as the use of CFCs (Chlorofluorocarbons) in refrigerators and aerosol sprays have led to ozone depletion. This results in an increase in UV radiation reaching the Earth, causing health issues like skin cancer and cataracts. To address this, eco-friendly practices like using CFC-free products, promoting 3Rs (Reduce, Reuse, Recycle), and adopting sustainable development are being encouraged globally.

Q1. What is the main function of the ozone layer?
(a) Absorbing oxygen
(b) Blocking UV radiation
(c) Absorbing carbon dioxide
(d) Reflecting sunlight

Q2. Which human activity causes ozone depletion?
(a) Planting trees
(b) Using solar energy
(c) Using CFCs in refrigerators
(d) Conserving electricity

Q3. Which of the following is not a harmful effect of UV rays?
(a) Skin cancer
(b) Eye cataracts
(c) Genetic damage
(d) Vitamin D deficiency

Q4. Which practice helps in environmental protection?
(a) Burning plastics
(b) Using CFC sprays
(c) Using the 3Rs
(d) Open defecation

Answers:
Q1. (b)
Q2. (c)
Q3. (d)
Q4. (c)

Also check

Topics from which case study questions may be asked

Food Chains and Food Webs
Trophic Levels and Energy Flow (10% Law)
Biodegradable and Non-Biodegradable Wastes
Impact of Human Activities on Ecosystem
Ozone Layer and Its Depletion
Waste Management and Eco-Friendly Practices

Case study questions from the above topics may be asked.

Helpful Links for CBSE Class 10 Science Preparation

Frequently Asked Questions (FAQs) on Our Environment 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 10 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 should students approach answering case study questions for CBSE?

A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of chemical reactions and equations, and formulate well-supported solutions or responses.

Q4: Are there any resources available online for students to practice case study questions on class 10 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. If you need more case study questions for your preparation, then you visit Physics Gurukul website.

Q5: How can students effectively prepare for case study questions on Our Environment 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 Our Environment class 10 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 Our Environment.

Q7: We often use the word ‘environment’. What does it mean?

Ans. The sum total of all physical, chemical and biological conditions that influence the growth and survival of an organism is referred to as environment.

Q8: What is an ecosystem?

A8: An ecosystem is defined as an area where biotic (living) and abiotic (non-living) components interact with each other

Q9: List any two biotic components of an ecosystem.

A9: Two biotic components of an ecosystem are plants and animals.

Q10: Why is forest considered a natural ecosystem?

A10: Forest is considered a natural ecosystem because it is naturally sustainable and grow without human intervention.

Q11: Bacteria and fungi are called decomposers. Why?

A11: Bacteria and fungi are called decomposers as they break down the complex organic substances into simple inorganic substances that go into the soil and are used up once more by the plants

Q12: Autotrophs are at the first level of food chain. Give reason.

A12: Only green plants (autotrophs) have the ability to trap solar energy to manufacture their own food by photosynthesis. Hence, green plants always acquire the first trophic level in a food chain.

Q13: The depletion of ozone layer is a cause of concern. Why?

A13: If ozone layer gets depleted, the harmful UV rays from Sun will reach the Earth. These radiations are highly damaging to organisms as they can cause skin cancer in human beings and several other diseases in animals too.

Q14: Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?

A14: Biodegradable and non-biodegradable wastes should be discarded in two separate bins as this helps in effective treatment and disposal of these wastes.