Our Environment Quiz - CBSE Class 5 Science

Free practice quiz: Our Environment (CBSE Class 5 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. What is the main source of energy for the Earth?

   1. The Sun
   2. The Moon
   3. The Stars
   4. The Oceans
   Show answer

   Answer: A. The Sun

   The Sun is the primary source of energy for all life on Earth.

2. Why are trees called the 'lungs of the Earth'?

   1. Because they store air
   2. Because they produce oxygen
   3. Because they filter water
   4. Because they produce carbon dioxide
   Show answer

   Answer: B. Because they produce oxygen

   Trees absorb carbon dioxide and release oxygen, which is essential for life on Earth.

3. What is the term for the variety of life in a particular habitat?

   1. Population
   2. Biodiversity
   3. Ecosystem
   4. Community
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   Answer: B. Biodiversity

   Biodiversity refers to the variety of living species in a habitat or ecosystem.

4. What role do bees play in our environment?

   1. Predators
   2. Decomposers
   3. Pollinators
   4. Prey
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   Answer: C. Pollinators

   Bees are crucial pollinators, helping plants reproduce by transferring pollen.

5. Why is biodiversity important for ecosystem stability?

   1. It reduces resources
   2. It increases competition
   3. It ensures balance
   4. It permits extinction
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   Answer: C. It ensures balance

   Higher biodiversity means ecosystems can better withstand changes and disturbances.

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