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The main reason for this is that deserts get very little rainfall.

Deserts near the equator are dry. This is because in these places, instead of hot air rising, and being replaced by cool moist air, air settles downwards, and becomes warmer and drier as it does so.

Deserts that are far away from the equator are generally dry, because of their distance from the sea. This prevents moisture laden winds from reaching them. Sometimes, there are mountains which act as barriers to the winds. These moun tains will get rainfall on the side facing the sea, but the side facing land doesn’t get any rain.

There are sandy deserts, where the wind builds sand hills ordains, Rocky deserts consist of bare rocks. Cold deserts are located near the Arctic region of the world.


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To know the answer to this question, you must first understand that sunlight is made up of different colours, from red, orange, and yellow, to green, and blue.

When sunlight falls on the sea, it is the colour blue that is reflected by the water most easily, giving the sea its blue colour. Near the coast, sea water takes on a yellow or brownish tinge. This is due to the mud that rivers discharge into the sea, and the vast number of tiny plants and animals near the surface.

When clouds hide the sun, the sea will look grey. Weather conditions can also change the colour of the sea.