What is the primary source of energy or process that leads to the formation of igneous rock?

The pressure from overlying layers of material compacting together.

The intense heat from within the Earth that melts rock into magma.

The chemical reactions caused by water dissolving minerals over time.

The slow erosion of mountains by wind and rain carrying particles.

Which of the following best describes the material that is the starting point for most sedimentary rock?

Hot, liquid magma from deep within the Earth's crust.

Layers of accumulated sand, mud, and small pebbles.

A single, large crystal that grows over millions of years.

Molten metal that has cooled and hardened on the surface.