Rock Vocabulary Part 1

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Rock

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A solid mixture of minerals or other materials.

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Metamorphic Rock

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Forms when rock changes from heat, pressure, or chemicals.

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Texture

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The size and shape of minerals that make the rock.

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Igneous Rock

Back

Forms from cooling of magma or lava.

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Sedimentary Rock

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Forms when small pieces of rock or remains of plants and animals are pressed and stuck together.

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Extrusive

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Igneous rock that forms when lava cools on Earth’s surface.

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Basaltic

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A dark-colored igneous rock that has a lower silica content than granite.

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Intrusive

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Igneous rock that forms when magma hardens under the Earth’s surface.

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Erosion

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The process by which running water, wind, or ice carry away bits of broken-up rock.

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Deposition

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The process by which solids move to the bottom of water or wind moves it.