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Earth Science Project

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