Which type of rock is made from molten material within the earth's surface?
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Answer: C. Igneous rock
Explanation
Igneous rocks form directly when molten material such as magma or lava cools and solidifies. Solidification of liquid rock creates interlocking mineral crystals characteristic of igneous formations. Geological processes deep within the Earth generate the molten source material for igneous rocks. Magma is molten rock located beneath the Earth surface, while lava erupts onto the exterior. The rock cycle describes how geological materials transform between igneous, sedimentary, and metamorphic states. Crystal size in igneous rocks depends on how rapidly the molten material cools down.
Volcanic activity produces vast expanses of igneous rock that shape planetary landscapes. Geologists classify igneous rocks into intrusive and extrusive categories based on cooling locations. Many valuable mineral deposits are associated with cooling magma chambers beneath volcanoes. Sedimentary rocks form from the accumulation and cementation of mineral or organic particles. Schist is a specific type of metamorphic rock formed under directional pressure and heat. Metamorphic rocks arise from the alteration of existing rocks through heat and pressure.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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