G4-2 Mid/T_Science_Earth_Ch6. Saving Earth's Resources

a natural, nonliving, usually solid material from Earth's crust

surface soil layer rich in nonliving plant and animal matter and minerals.

an energy source from the remains of an organism that lived millions of years ago

a storage area for holding and managing freshwater

harmful or unwanted material that has been added to the environment

the wise use of resources

a natural, nonliving substance that makes up rock

_______ ____ form from melted rock - either from magma below Earth's crust or from lava above it.

___________ ____ form from sediments that are cemented or pressed together.

________ ___ is the age of one thing compared to another.