Abeka grade 8 science reading quiz F
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What are rocks that form when magma reaches the surface and is forced out of the earth as lava?
extrusive rock
True/False: The most common igneous rock is the fine- grained, extrusive rock obsidian.
false
What rock composes most of the continental crust?
granite
What are rocks that form when magma solidifies?
igneous rocks
True/False: When magma cools very rapidly, no crystals form, and the rock is amorphous.
true
