Question

Choose the correct answer.
1. The coldest layer of atmosphere is
(a) troposphere (b) stratosphere
2. In the process of purification of water chlorine tablets are added to
(c) mesosphere (a)
(a) kill the germs in water
(b) remove the soluble impurities from the water
(c) remove the insoluble impurities from the water
(d) remove the suspended impurities from the water
3. The soil is formed by the process of
(a) fossilisation
(b) weathering of rocks
(C) volcanic eruption
(d) rock cycle
4. Tides are caused due to the
(a) gravity of moon (b) mass of moon (c) atmosphere of moon (d) craters om
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Answer 1

Answer:

1.c) mesosphere

2. (a) kill the germs in water

3. (b) weathering of rocks

4. (a) gravity of moon

Explanation:

Answer 2

mesosphere

to kill germs

wethering of rocks

gravity of moons