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The smaller desert animals do not drink water. They stay in underground tunnels during the hot day and come out only at night to eat . Some of them eat other animals and get the water they need from the moisture in the meat. Others eat plants and seeds, and get the water they need from plant juice.
Desert plants also change themselves according to the life they lead. Cactus plants store water in their thick stems, Their roots lie close to the surface of the ground and quickly take in the tiny drops of water from the light rains that occasionally fall.
The major feature of all deserts is, of course, dryness and differences of temperature. In hot and wet climates, the moisture in the air acts like a blanket and protects the earth's surface from the hot rays of the sun.The absence of this blanket in desert lands causes the desert to heat up rapidly during the day and to cool down rapidly at night.
Deserts are an important part of nature's great plan. They are there like the thick forests and the deep oceans. Just because they are hot and dry, one should not look upon then as useless parts of the earth.
A desert is not always a flat, unchanging area of dry sand. It may have mountains and hills. It may have an oasis, big or small. An oasis is like a green island in the middle of la desert where a spring or ell gives plants and trees a better chance to grow. A desert may hit like Thar it cold like Ladakh.
some desert totally without water. In such places strong winds raise huge amount of sand and deposit them as heaps. These are called sand dunes and they can shift and move endlessly across the desert.