Rocks ROCK!

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What is a rock?

Back

A rock is a solid material made up of one or more minerals or mineraloids.

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What are the three main types of rocks?

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Igneous, sedimentary, and metamorphic.

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What is an igneous rock?

Back

Igneous rocks are formed from the cooling and solidification of magma or lava.

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What is a sedimentary rock?

Back

Sedimentary rocks are formed from the accumulation and compaction of mineral and organic particles.

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What is a metamorphic rock?

Back

Metamorphic rocks are formed from existing rocks that are changed by heat, pressure, or chemically.

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What is pumice?

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Pumice is a light, porous volcanic rock that forms when lava cools quickly.

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What is schist?

Back

Schist is a medium-grade metamorphic rock characterized by well-aligned minerals.

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What is obsidian?

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Obsidian is a naturally occurring volcanic glass formed from rapidly cooled lava.

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What is gneiss?

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Gneiss is a high-grade metamorphic rock with a banded or foliated appearance.

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What is conglomerate?

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Conglomerate is a sedimentary rock composed of rounded fragments cemented together.