Question

question 1 of 5
which two statements describe how igneous rock is formed?
a. existing rock changes into new kinds of rock due to heat and pressure.
b. liquid rock hardens into solid rock as it cools underground.
c. solid rock melts to form magma and then solidifies as it cools.
d. solid rock breaks down into fragments that become part of new rock.

Explanation:

• Igneous rocks form from the cooling and solidification of magma (molten rock).
• Option B describes liquid rock (magma or lava) cooling underground (intrusive igneous rocks) or on the surface (extrusive igneous rocks) to form solid rock.
• Option C also aligns as solid rock melts to form magma (which is liquid rock) and then solidifies (cools) to form igneous rock.
• Option A describes metamorphic rock formation (due to heat and pressure).
• Option D describes sedimentary rock formation (from fragments of other rocks).

Answer:

B. Liquid rock hardens into solid rock as it cools underground.
C. Solid rock melts to form magma and then solidifies as it cools.