Q1 of 287 Page 350

Major component of the atmosphere on Venus and Mars planet is

The atmosphere on Venus is primarily composed of 97% carbon dioxide which is denser and hotter than that at earth. Mars too, is composed of 95% carbon dioxide.

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4

Uneven heating of Earth produces winds. 1

 5

Matching the column I and column II 1











Column I



Column II



1. GHG


2. CFCs


3. PAN


4. Lichen



(a) Paedogenesis


(b) Methane


(c) Global warming


(d) Smog


 2

All the elements of life support system are

 3

In a natural ecosystem, decomposers include