Rocks and Minerals

Solid material made of one or more minerals

Earths solid outer layer

center of earth

Earth's middle layer

Rock that was once melted but has cooled and hardened.

materials that settle into layers and harden

Rocks that has been changed by heat and pressure

a progress of changing rock types

Marks or remains of a once -living thing

riches layer of soil

soil that has small grains and holds water easily

material made up of decayed living things

rich soil with a lot of humus