Tick the correct answer:
(i) Which is the following gases protects us from harmful sun rays?
(a) Carbon dioxide (b) Nitrogen (c) Ozone.
(ii) The most important layer of the atmosphere is:
(a) Troposphere (b) Thermosphere <c) Mesosphere.
(iii) Which of the following layers of the atmosphere is free from clouds?
(a) Temperature (&) Air pressure (c) Wind direction.
(iv) As we go up the layers of the atmosphere, the pressure—
(a) Increases (^Decreases (c) Remain the same;
(v) When precipitation comes down to earth in the liquied form, it is called:
(a) Cloud (b) Rain (c) Snow.