ESS
Grade-9
Easy

Question

Assertion: CO2 is a major greenhouse gas.
Reason: Increase in CO2 level leads to decrease in Earth’s temperature.

  1. If both assertion and reason are true and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion. 
  3. Assertion is true, but reason is false.
  4. Assertion is false, but reason is true.

hintHint:

Carbon dioxide emission increases greenhouse effect thereby increasing temperature of the Earth

The correct answer is: Assertion is true, but reason is false.


    Carbon dioxide is a major greenhouse gas that plays a role in trapping the heat radiated by Earth and doesn't allow it to escape into the space. Therefore it increases the temperature of the Earth

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