Asked by katy

How can earth's layers be defined? (two answers)

by their amounts of land area

by their physical properties(this)

by their asthenospheres

by their chemical compositions(this)

by their proximities to the core

the chemical one is right but im not sure about the second option.
Answered by PsyDAG
How is this biology?
Answered by Writeacher
It isn't biology. This is earth science.

=(
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