Chapter 3 Review

What does the Mohs Scale measure?

This soil layer contains the most humus.

c

topsoil

bedrock

subsoil

This layer has larger pieces of rock. It contains less humus than topsoil.

c

subsoil

topsoil

bedrock

The last layer has large, unbroken rock.

c

topsoil

subsoil

bedrock

• bedrock

• humus

• water

• break apart, or rot

• break down rock into smaller pieces

• survive and grow

• bedrock

• humus

• subsoil

• erosion

• humus

• weathering

• erosion

• humus

• weathering

• anything made by people

• anything in nature that God made for people to use