If Earth was like a hardboiled egg, which part of Earth would the egg shell represent and why? Crust, as its depth is up to 3000 kilometers
Mantle, as its depth is up to 3000 kilometers
Mantle, as its depth is less than 100 kilometers
Crust, as its depth is less than 100 kilometers

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The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space. b. we'll know it immediately because it will be brighter than the full moon in the sky. c. we won't know about it until 600 years from now. d. none of the above.

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)