Question

briefly describe the earth's crust 100 words
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Answer 1

The Earth's crust is an extremely thin layer of rock that makes up the outermost solid shell of our planet. In relative terms, it's thickness is like that of the skin of an apple. It amounts to less than half of 1 percent of the planet's total mass but plays a vital role in most of Earth's natural cycles.

The crust can be thicker than 80 kilometers in some spots and less than one kilometer thick in others. Underneath it lies the mantle, a layer of silicate rock approximately 2700 kilometers thick. The mantle accounts for the bulk of the Earth.

The crust is composed of many different types of rocks that fall into three main categories: igneous, metamorphic and sedimentary. However, most of those rocks originated as either granite or basalt. The mantle beneath is made of peridotite. Bridgmanite, the most common mineral on Earth, is found in the deep mantle.

Answer 2

In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mental. the upper part of the Mantle is composed mostly of paridotite, a Rock denser then rocks common in The overlying crust.

the earth's crust is an extremely thin layer of Rock that makes up the outermost solid shell of our planet. in relative terms, its thickness is like that of the skin of an apple. it amounts to less than half of 1% of the planets total mass but plays a vital role in most of Earth's natural cycle. The crust can be thicker than 80 kilometres in some spots and less than 1 kilometre thick in others. underneath it lies the mental, A layer of silicate Rock approximately 2700 km thick. the mental accounts for the bulk of the earth.

The crust is cost of many different type of rocks that fall into three main categories:

• igneous
• metamorphic
• sedimentary

however, most of those rocks originated as either granite or basalt. the Mantle beneath is made of peridotite. bridgmanite, the most common material on earth , is found in the deep mental.

It is of 2 types:-

• oceanic
• Continental