Which rock type crystallizes from a molten state?

Which rock type crystallizes from a molten state?

• A. Igneous
• B. Metamorphic
• C. Sedimentary
• D. Basalt

Answer: (A)

Rocks that crystallize from molten material come from cooling of magma or lava. As the melt cools, minerals crystallize and lock together to form a solid rock, which is the defining process of igneous rocks. This category includes rocks formed beneath the surface (intrusive) and at the surface (extrusive), with texture reflecting cooling rate. Basalt is an example of an igneous rock, but the question points to the broader rock type formed from molten material, which is igneous. Metamorphic rocks form from existing rocks transformed by heat and pressure without melting, and sedimentary rocks form from weathering, deposition, and lithification.

Rocks that crystallize from molten material come from cooling of magma or lava. As the melt cools, minerals crystallize and lock together to form a solid rock, which is the defining process of igneous rocks. This category includes rocks formed beneath the surface (intrusive) and at the surface (extrusive), with texture reflecting cooling rate. Basalt is an example of an igneous rock, but the question points to the broader rock type formed from molten material, which is igneous. Metamorphic rocks form from existing rocks transformed by heat and pressure without melting, and sedimentary rocks form from weathering, deposition, and lithification.