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Earth Science Project

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Across
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Boundary plates move apart
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How many types of convergent boundaries are there?
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What is it called when sand grains wear away surface of rocks
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Used to provide the relative age of a rock layer.
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When gravity moves rocks or soil down a slope.
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Age of rock layer
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Gradual movement of soil downhill.
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A way to describe rate of decay by how long it takes
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When magma is forced into older rock layers.
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Boundary plate move together
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Earth's crust on top of the mantle
Down
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How many agents of erosion are there?
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The process of wind carrying away loose sediment.
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When magma cools on the surface of the earth
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Hotter and softer rock in the upper mantle.
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Instrument used to detect ground movement
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When wind sloes it drops sediments.
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Two plates that scrape past each other
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When new rock layers meet a much older rock surface beneath
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A break in the earth's crust