write short notes on:- 1) rocks
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rocks very hard meterial it is used for making many types of cosmetics such as powder
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Rock is a naturally occurring, solid mixture of one or more minerals or organic matter. Rocks are classified into 3 groups based on how they are formed. The 3 types of rocks are sedimentary rocks, igneous rocks and metamorphic rocks.
Sedimentary rocks:- Rock formed by layers of materials that have been squeezed and hardened.
Igneous rocks:- Rock formed by melted rock that has cooled and hardened.
Metamorphic rocks:- Rock that has been changed by heat and pressure.
Sedimentary rocks:- Rock formed by layers of materials that have been squeezed and hardened.
Igneous rocks:- Rock formed by melted rock that has cooled and hardened.
Metamorphic rocks:- Rock that has been changed by heat and pressure.
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