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Biology 7 Online
OpenStudy (anonymous):

The two principal ways to describe Earth’s structure are based on the _______. a. chemical composition and thickness of layers b. chemical composition and mechanical properties of layers c. mechanical properties and thickness of layers d. the composition and viscosity of minerals

OpenStudy (anonymous):

i am thinking it a

OpenStudy (anonymous):

what do u think

OpenStudy (anonymous):

I also think that it is A.

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