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Astronomy
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Earth as a Planet
Grade Level
Astronomy
AST.138 Earth as a Planet
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Why is Earth classified as a terrestrial planet?
A
It is made mostly of hydrogen and helium and has no solid surface.
B
It formed beyond Neptune and is mostly frozen nitrogen.
C
It is a rocky, high-density planet with a solid surface and metal-silicate interior.
D
It is a small icy moon orbiting a giant planet.
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