Soil

What is made of organic materials, gases, and water?

• clay

• soil

• silt

• mud

A man lives in a dry, windy area. Which method would be best to conserve the soil?

• loosen dirt

• cut down some trees

• plant grass

• blow air

True or false: soil takes a long time to form

• true

• false

True or false: humus is from once living organisms

• true

• false

All of the following are true about humus EXCEPT

• very dark in color

• has lots of nutrients

• is from once living organisms

• breaks down rocks into smaller pieces

Clay, humus, sand, silt, and rock fragments are all components of...

• rocks

• sand

• soil

• metal

Which soil provides the fewest nutrients for plant growth?

• sand

• silt

• clay

• humus

Which component of soil holds the most water?

• clay

• silt

• sand

• humus

This layer of soil is best for growing plants

• bedrock

• subsoil

• midsoil

• topsoil

What does soil provide that is necessary for plant growth? (TWO ANSWERS)

• silt and clay

• nutrients and minerals

• sand

• rock fragments

• place for roots to hold on