A student buries an ice cube in a pan of dirt and observes the dirt as the ice cube melts. This activity is a model of the formation of a kettle.
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The upper layer of the mantle is said to be thicker than the lower mantle, but not solid rock like crust. The tectonic plates rest on this layer and it is responsible for the movement of those plates.
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The Grand Canyon is about 5-6 million years old, or was formed about 5-6 million years ago
The correct answer is (c.) Lithosphere. The lithosphere is not a layer of the atmosphere, instead, it is a layer of the grounds of the Earth. It is the rigid outer layer that consists of the upper mantle and crust.
