Rocks and rock cycle review

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How are igneous rocks formed?

Back

Igneous rocks are formed from molten (liquid) rock cooling back into a solid.

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Why is coal considered to be an organic rock?

Back

Coal is considered to be an organic rock because it's made from once living swamp plant material.

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Where would you find rock with fine grains (mineral crystals)?

Back

You would find rock with fine grains at the surface of the Earth where lava cooled quickly.

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What is the main difference between magma and lava?

Back

Magma is liquid rock inside the Earth, while lava is liquid rock that has reached the surface.

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How are sedimentary rocks formed?

Back

Sedimentary rocks are formed from layers of rock being 'glued' together.

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What is the rock cycle?

Back

The rock cycle is the continuous process of rock formation, breakdown, and reformation.

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What are the three main types of rocks?

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The three main types of rocks are igneous, sedimentary, and metamorphic.

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What is an example of an igneous rock?

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An example of an igneous rock is granite.

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What is an example of a sedimentary rock?

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An example of a sedimentary rock is sandstone.

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What is an example of a metamorphic rock?

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An example of a metamorphic rock is marble.