Which type of rock forms when magma or lava cools and becomes solid?
Answer and explanation
Correct answer: D. Igneous rock
- Step 1: Igneous rock forms when molten rock cools and crystallizes, either underground from magma or at the surface from lava. Answer: Igneous rock. Why not the others: Sedimentary rock forms from layers of sediment that are compacted and cemented, metamorphic rock forms when existing rock is changed by heat and pressure, and limestone is a sedimentary rock.
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