Which best describes how igneous rocks are formed?

A.
Layers of dirt and other rocks are pressed together to form igneous rocks.

B.
Molten material in the earth cools and hardens to form igneous rocks.

C.
Elements in the earth form igneous solids with crystals.

D.
Wind erodes mountains into small igneous rocks.

Question

Which best describes how igneous rocks are formed?
 
 A.
Layers of dirt and other rocks are pressed together to form igneous rocks.
 
 B.
Molten material in the earth cools and hardens to form igneous rocks.
 
 C.
Elements in the earth form igneous solids with crystals.
 
 D.
Wind erodes mountains into small igneous rocks.

anonymous · Answer

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kohai · Answer

Igneous rocks are formed when magma crystallizes and cools into a solid form.