Final answer:
Rocks are classified into three main groups: Igneous, Sedimentary, and Metamorphic rocks.
Explanation:
Rocks are classified based on how they were formed into three main groups:
- Igneous rocks form from the cooling of magma or lava.
- Sedimentary rocks are formed from compacted and cemented sediments.
- Metamorphic rocks are rocks that have transformed due to heat and pressure.
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