Observe the following picture:
What do you notice about the rock?
What is it made of?
- Rocks are extensive
mineral bodies composed of one or more minerals in different
amounts, which form part of the earth's crust.
- Rocks are made of two or more different minerals
that have been:
- cemented together, or
- squeezed and heated together, or
- melted and cooled together.
- Rocks make up the majority of the Earth's crust.
One of the most common rock is granite.
The four minerals that make up granite are feldspar, quartz, mica
and hornblende. These are some of the same minerals that you learned
about!!
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