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5 August, 00:26

How are igneous rocks formed?

A. Lava or magma heats up and crystallizes.

B. Hail falls and melts.

C. Glaciers melt.

D. Lava or magma cools and then crystallizes.

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  1. 5 August, 02:40
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    Its D. obsidian is a rock that is cooled from lava to form a hard, black glass that was made into spear tips.
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