A couple Earth Science questions ! Thank you?

Corona

New member
1. Compounds with ________ bonds are poor conductors of electricity, even when melted.

2. A naturally occurring, inorganic solid that has an orderly crystalline structure and a definite chemical composition is a(n) ______ .

3.. As magma cools, the first minerals to ______ are rich in iron, calcium, and magnesium

4.
Minerals are classified into groups based on _______ .
 
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