What processes break down and build up Earth's surfaces?

Weathering, erosion, and deposition are processes that act together to wear down and build up the Earth's surface. These processes have occurred over billions of years. Weathering is any process that breaks down rocks and creates sediments. There are two forces of weathering, chemical and mechanical (physical).

Explanation:

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i'd say that the moon rock is about 2.2 billion years old.

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