Lesson 2 Rocks

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Rock

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A naturally occurring solid aggregate of minerals or mineraloid matter.

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Grain

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The individual particles or crystals in a rock.

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Magma

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A molten rock material found beneath the Earth's surface.

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Lava

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Magma that has reached the Earth's surface.

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Texture

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The feel, appearance, or consistency of a rock's surface.

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Sediment

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Solid material that is moved and deposited in a new location.

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Foliation

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The repetitive layering in metamorphic rocks.