Environment Quiz - CBSE Class 7 Social Science
Free practice quiz: Environment (CBSE Class 7 Social Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
Play all 20 questions freeSample questions
What does the term 'environment' refer to?
- Only the natural surroundings
- Only human-made surroundings
- The surroundings that affect living organisms
- None of the above
Show answer
Answer: C. The surroundings that affect living organisms
The environment encompasses all living and non-living things that interact and affect organisms, which includes both natural and human-made surroundings.
What is a consequence of deforestation?
- Increased rainfall
- Loss of biodiversity
- More oxygen production
- Improved soil fertility
Show answer
Answer: B. Loss of biodiversity
Deforestation leads to the destruction of habitats, which results in loss of species and reduction in biodiversity.
Why is biodiversity important for the environment?
- It reduces the need for water
- It increases food production
- It enhances ecosystem stability
- It makes ecosystems more complex
Show answer
Answer: C. It enhances ecosystem stability
Biodiversity contributes to the resilience and stability of ecosystems, allowing them to withstand environmental changes.
What is the impact of overfishing on marine ecosystems?
- Increases fish populations
- Decreases biodiversity
- Enhances food security
- Improves ocean health
Show answer
Answer: B. Decreases biodiversity
Overfishing can lead to the decline of fish populations and disrupt the balance of marine ecosystems by reducing biodiversity.
What is the significance of the ozone layer?
- It provides oxygen
- It protects living organisms from harmful UV radiation
- It contributes to climate change
- It has no significance
Show answer
Answer: B. It protects living organisms from harmful UV radiation
The ozone layer absorbs the majority of the sun's harmful UV radiation, protecting living organisms on Earth.