Science Terms

Topsoil

The uppermost layer of soil

Top Soil

SubsoilThe layer of soil just below the

uppermost layer of soil

Subsoil

BedrockUnweathered rock that lies below the

lowest layer of soil

Bedrock

FossilThe preserved remains of a plant or

animal that lived long ago

Bedrock

DeltaA large mass of deposited sediment

at the mouth of a river

WeatheringThe slow breaking apart or wearing

away of rock into smaller pieces

Erosion

The movement of weathered rock material from on place to another

Question

Wind moving sand from a dune

What is an example of erosion?

Question

Large rocks wearing down

What is an example of weathering?

Question

How are weathering and erosion related to one another?