Question

select the correct answer. what is the primary way that metamorphic rocks form?
a. lava erupts from earth and cools.
b. water, wind, and gravity move particles from one place to another.
c. rock fragments break apart and collect as sediment.
d. existing rocks join together under high heat and pressure.

Explanation:

To determine the correct answer, we analyze each option:

• Option A describes the formation of igneous rocks (lava cooling).
• Option B refers to erosion and transportation, not metamorphic rock formation.
• Option C describes sedimentation, leading to sedimentary rocks.
• Option D: Metamorphic rocks form when existing rocks (igneous, sedimentary, or other metamorphic) are subjected to high heat and pressure, causing physical and chemical changes. This matches the definition of metamorphic rock formation.

Answer:

D. Existing rocks join together under high heat and pressure.