Class 10 Biology Worksheet Our Environment

The chapter “Our Environment“ in Class 10 Biology is an essential topic that helps students understand the intricate relationship between living organisms and their surroundings. This chapter emphasizes the importance of maintaining ecological balance, the impact of human activities on the environment, and the need for sustainable practices to ensure a better future.

Our environment consists of biotic (living) and abiotic (non-living) components that interact with each other to form a harmonious ecosystem. Understanding these interactions is crucial to recognizing how human actions, such as deforestation, pollution, and overuse of natural resources, disrupt this balance. The chapter introduces key concepts like food chains, food webs, trophic levels, and the flow of energy in ecosystems, which highlight the interdependence of all life forms.

Another significant aspect covered is the concept of biodegradable and non-biodegradable substances, which plays a pivotal role in waste management. By learning about these materials, students can better appreciate the importance of reducing, reusing, and recycling to minimize environmental degradation.

The chapter also sheds light on pressing environmental issues like global warming, ozone layer depletion, and biodiversity loss, helping students grasp the urgency of adopting eco-friendly practices. Through this worksheet, students will not only reinforce their understanding of these critical concepts but also develop an awareness of their role in preserving the environment.

This worksheet is designed to include multiple-choice questions, short-answer questions, and application-based activities to ensure comprehensive learning. By practicing these exercises, students will gain a deeper insight into the importance of protecting the environment and the steps they can take to contribute positively.

Do Check: Our Environment Chapter Wise Important Questions Class 10 Science

• Ecosystem and its Components: Biotic and abiotic components, producers, consumers, and decomposers.
• Food Chains and Food Webs: Types, significance, and examples.
• Trophic Levels and Energy Flow: The 10% law and energy transfer.
• Biodegradable and Non-Biodegradable Wastes: Examples and effects on the environment.
• Ozone Layer and its Depletion: Causes, effects, and prevention.
• Environmental Problems and Solutions: Pollution, waste management, and sustainable development.

Class 10 Biology Worksheet Our Environment

Worksheet on Ecosystem and Components

1. Fill in the blanks:

• Plants are called _______ because they prepare their own food using sunlight.
• Decomposers like fungi and bacteria break down _______ matter.
• _______ is the primary source of energy for all ecosystems.

2. Define the following terms:

• Ecosystem
• Biotic components
• Abiotic components

3. Match the following:

   Column A	Column B
   Producers	Fungi
   Primary Consumers	Grass
   Decomposers	Cow
   Abiotic Components	Air, water, soil

4. Short Answer Questions:

• List two examples each of biotic and abiotic components in an ecosystem.
• Why are decomposers important in an ecosystem?

5. Activity:

• Draw and label the components of a simple ecosystem, such as a pond or forest.

Worksheet on Food Chains and Food Webs

1. Multiple Choice Questions (MCQs):

• In a food chain, the herbivores are known as: a) Producers b) Primary consumers c) Secondary consumers d) Decomposers
• Which of the following is an example of a food web? a) Grass → Deer → Lion b) Grass → Grasshopper → Frog → Snake c) A network of interconnected food chains d) None of the above

2. Label the Diagram:

• Identify the trophic levels in the following diagram and label them: (Provide a simple food chain diagram with spaces for labels like producer, primary consumer, etc.)

3. Answer the following questions:

• Explain why food webs are more stable than food chains.
• Write a food chain involving a plant, an insect, a frog, and a snake.

4. Critical Thinking Question:

• If the population of snakes in an ecosystem decreases, what will happen to the population of frogs and insects? Explain.

Do Check: NCERT Solutions for Class 10 Science Chapter 15 Our environment

Worksheet on Trophic Levels and Energy Flow

1. True or False:

• Only 10% of the energy is passed on to the next trophic level in a food chain.
• Plants occupy the third trophic level in a food chain.
• Energy flow in an ecosystem is unidirectional.

2. Numerical Question:

• If the energy available at the producer level is 10,000 joules, calculate the energy available at the primary consumer and secondary consumer levels.

3. Short Questions:

• What is the 10% law of energy transfer?
• Why is energy flow in an ecosystem said to be unidirectional?

4. Diagram-based Question:

• Draw a pyramid of energy for an ecosystem with three trophic levels and label it.

Worksheet on Biodegradable and Non-Biodegradable Waste

1. Classify the following as biodegradable or non-biodegradable:

• Vegetable peels
• Plastic bottles
• Paper
• Glass

2. Short Questions:

• Give two examples of biodegradable waste and non-biodegradable waste.
• Why is it important to segregate waste at the source?

3. Long Answer Question:

• Discuss the harmful effects of non-biodegradable waste on the environment. Suggest ways to reduce its impact.

4. Activity:

• Conduct a waste audit at home and list items under biodegradable and non-biodegradable categories.

Worksheet on Ozone Layer and its Depletion

1. Fill in the blanks:
   • The ozone layer is found in the _______ layer of the atmosphere.
   • _______ and _______ are harmful chemicals that deplete the ozone layer.
   • Ozone depletion increases the risk of _______ in humans.
2. Short Questions:
   • What is the function of the ozone layer?
   • List two causes of ozone layer depletion.
3. Long Answer Question:
   • Explain the harmful effects of ozone layer depletion and suggest measures to protect it.
4. Activity:
   • Create a poster to raise awareness about protecting the ozone layer.

Do Check: Speech on Environment for Students

Worksheet on Environmental Problems and Solutions

1. Case Study:
   • A city generates 100 tons of waste daily. Only 30% is segregated at the source. Discuss the problems this can cause and suggest solutions.
2. Answer the following:
   • What is sustainable development? Why is it important?
   • How can individuals contribute to reducing pollution?
3. Project Idea:
   • Prepare a report on how your school can adopt eco-friendly practices to reduce waste and conserve energy.

Additional Worksheet on Class 10 Our Environment

1. Assertion and Reason:

• Assertion: Decomposers are crucial for nutrient cycling.
• Reason: They break down organic matter into simpler substances.
• a) Both assertion and reason are correct, and the reason explains the assertion.
• b) Both assertion and reason are correct, but the reason does not explain the assertion.
• c) Assertion is correct, but the reason is incorrect.
• d) Both assertion and reason are incorrect.

2. Group Activity:

• Form groups and create a model ecosystem using available materials like paper, clay, and natural items. Present it to the class.

3. Diagram Labeling:

• Provide a diagram of the carbon cycle and ask students to label the steps.

4. Short Note:

• Write a short note on the importance of the “Three Rs” (Reduce, Reuse, Recycle).

5. Identify and Correct the Error:

• “Plants occupy the topmost trophic level in a food chain.” Correct the statement and explain why.