Fill the missing word in the blank spaces in the following statements:
(a) Wind is _______ air.
(b) Winds are generated due to ________ heating on the earth.
(c) Near the earth's surface ________ air rises up whereas _________ air comes down.
(d) Air moves from the region of __________ pressure to a region of __________ pressure.
(a) Wind is moving air.
The moving air is called wind.
(b) Winds are generated due to uneven heating on the earth.
Uneven heating on the earth is the main cause of wind movements.
(c) Near the earth's surface hot air rises up whereas cold air comes down.
The warm air is lighter than the cold air. Warm air rises up, whereas comparatively cooler air tends to sink towards the earth’s surface.
(d) Air moves from the region of high pressure to a region of low pressure
Air moves from the region where the air pressure is high to the region where the pressure is low. The greater the difference in pressure, the faster the air moves.