Our Environment Class 10 Science MCQ Quiz – Test Your Knowledge

Are you ready to test your knowledge of Our Environment? This chapter focuses on ecosystem components, food chains, trophic levels, ozone layer depletion, and waste management—important topics for your CBSE Class 10 Science exam.

About the Quiz

  • Chapter Name: Our Environment
  • Subject: Science (Biology)
  • Book: NCERT Class 10 Science
  • Question Type: Multiple Choice Questions (MCQs)
  • Leaderboard: Yes (Compete with Others!)

Why Take This Quiz?

✔ Helps in quick revision for board exams
✔ Covers important NCERT-based questions
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Chapter 13 - Our Environment

1 / 15

  • Assertion: A greater number of individuals are present in lower trophic levels.
  • Reason: The flow of energy is unidirectional.

2 / 15

The given figure best represents:

food chain in forest, grassland and pond

3 / 15

Matter and energy are two fundamental inputs of an ecosystem. Movement of

4 / 15

Which of the following limits the number of trophic levels in a food chain?

5 / 15

If a deer is eaten by a tiger, then the energy transfer will be from

6 / 15

The decomposers are not included in the food chain. The correct reason for the same is because decomposers:

7 / 15

  • Assertion: Biodegradable substances result in the formation of compost and natural replenishment.
  • Reason: It is due to the breakdown of complex inorganic substances into simple organic substances.

8 / 15

If Ravi is consuming curd/yogurt for lunch, which trophic level in a food chain he should be considered as occupying?

9 / 15

The chemicals that are non-degradable, get progressively accumulated at each trophic level, and their concentration is seen maximum in the bodies of top consumers. This phenomenon is known as:

10 / 15

  • Assertion: The food chain is responsible for the entry of harmful chemicals into our bodies.
  • Reason: The length and complexity of food chains vary greatly.

11 / 15

In the food web, what two organisms are competing for food?

In the food web, what two organisms are competing for food

12 / 15

If 10,000 J solar energy falls on green plants in a terrestrial ecosystem, what percentage of solar energy will be converted into food energy?

food web class 10

13 / 15

Which of the following organisms convert organic material to inorganic forms?

14 / 15

Observe the food web and answer the questions given below:

Observe the food web and answer the questions given below

The mussel can be described as

15 / 15

Why do all food chains start with plants?

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Key Topics Covered in the Quiz

Ecosystem and Its Components
Food Chain & Food Web
Trophic Levels and Energy Flow
Biodegradable & Non-Biodegradable Substances
Ozone Layer & Its Depletion
Waste Management & Sustainable Development

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