Question

What are rocks? How many kinds of rocks are there?
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Answer 1

Answer:

The earth's crust is made up of rocks.A rocks is a mixture of minerals which form the earth upper part called crust.These rocks are composed of all types of minerals material which may be hard and resistant substance like - granite,marble etc.and of soft and loose substance like - salt,sand,mud,chalk etc.

There are three kinds of rocks-

(i) Igneous rocks.

(ii) Sedimentary rocks.

(iii) Metamorphic rocks.

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Answer 2

Answer:

Rock or stone is a natural substance, a solid aggregate of one or more minerals or mineraloids. For example, granite, a common rock, is a combination of the minerals quartz, feldspar and biotite. The Earth's outer solid layer, the lithosphere, is made of rock.

3 Types

3 Types of Rock: Igneous, Sedimentary & Metamorphic