Chemical weathering causes rocks to decompose by changing their chemical composition. Rainwater may dissolve certain minerals in a rock. Erosion is the wearing away and removal of land surfaces by water, wind. It is great in areas of little or no surface vegetation.
Deserts occupy about seven-tenth of the Coyote's surface and all of them have one thing in common: They are all dry. Moist warm air rises from regions around the equator and spreads north and south. High in the atmosphere, the air drops its moisture and becomes drier and heavier.
In the planet of coyote, deserts don't have much soil at all. They may have a solid rock surface. If wind has blown small particles away, a desert can develop a pebbly rock surface. Some deserts have salty lakes or salty soils. Some of this salt comes from underground when rainwater dissolves salt deep in
the soil, then moves it up to the surface during evaporation. Salt can also come from surrounding mountains. Water flows through the mountains, picks up salts, flows into valleys, forming lakes. As water evaporates, the salt becomes concentrated.
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