Question

part a
regardless of their size, most rocks are made up of _.
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magma
grains
synthetic minerals
minerals
submit
part b
minerals must be solid, have an orderly atomic structure, have a recognized chemical composition, be naturally occurring, an
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Explanation:

Rocks are composed of minerals. Magma is molten rock. Grains can be part of a rock's texture but not the fundamental composition. Synthetic minerals are man - made and not relevant to most natural rocks.

Answer:

minerals