Social Studies
RaymundoStowman640
2021-04-13 07:36:12
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.
ANSWERS
Findeisen17
2021-04-13 10:30:36

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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