ECOLOGY
ECOSYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The ground up shells of animals.
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Erosion of rocks.
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The breaking off of small particles from coral skeletons.
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All of the above
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Detailed explanation-1: -Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar.
Detailed explanation-2: -In the desert regions, the diurnal and annual ranges of temperature are very high. This enhances weathering by mechanical methods, where the large rocks are gradually broken down into small rock fragments. Also, abrasion of rocks leads to further break down of rocks into sand particles.
Detailed explanation-3: -Well, much of the world’s sand is made out of the same stuff, tiny crystals of the mineral quartz, which is made out of silica and oxygen, the two most common elements in Earth’s crust.
Detailed explanation-4: -Sand is a loose, fragmented, naturally-occurring material consisting of very small particles of decomposed rocks, corals, or shells.