define the terms of rocks class 7
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Rocks: The earth's crust is made up of rocks of various types. A rock is a natural piece of mineral matter that makes up the earth's crust. Rocks can be of differnt: Colour. Texture.
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Rocks are generally solid and contain minerals. Rocks can be created during volcanic eruptions, through erosion, or changed during metamorphism. There are many different types of rocks. Rock.
Explanation:
A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. ... Rocks are usually grouped into three main groups: igneous rocks, sedimentary rocks and metamorphic rocks.
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