Soil

Front

What are the three components of soil?

Back

Clay, sand, humus.

Front

Soil is composed of all of these natural materials EXCEPT: weathered rock, plant matter, plastic substances, animal remains.

Back

Plastic substances.

Front

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

Back

Humus.

Front

Are there minerals in soil?

Back

Yes.

Front

Which layer is the bottom of the soil profile?

Back

R - Bedrock.

Front

What is the top layer of soil called?

Back

Topsoil.

Front

What is the process called when rocks break down into smaller pieces?

Back

Weathering.

Front

What is the term for the mixture of organic matter, minerals, gases, liquids, and organisms that support life?

Back

Soil.

Front

What do we call the tiny particles of soil that are smaller than sand but larger than clay?

Back

Silt.

Front

What is the role of earthworms in soil?

Back

They help aerate the soil and break down organic matter.