What causes mountains, volcanoes, and earthquakes

Question Answer
crust the thin, outer layer of Earth
mantle the layer of rock beneath Earth’s crust
core the center of the Earth
plate a rigid block of crust and upper mantle rock
magma molten rock from earth’s mantle
volcano a mountain formed by lava and ash
earthquake a shaking of the ground caused by the sudden release of energy in Earth’s crust
fault a break or place where pieces of Earth’s crust move

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