1)obsidian
2)granite
3)pumice
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False. The three main types of rocks are igneous, sedimentary, and metamorphic. Magma is the molten rock beneath Earth's surface that solidifies to form igneous rocks.
Two types of igneous rocks are intrusive igneous rocks, which form from magma that cools and solidifies beneath the Earth's surface, and extrusive igneous rocks, which form from lava that cools and solidifies on the Earth's surface.
There are 3 main kinds of rocks. These 3 types of rocks are Igneous, Metamorphic and Sedimentary and pictures can be found in books at your local library.
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Igneous rock