Soil Review

_____________ is made up of bits of dead animals and plants.

• Loam

• Soil

• Humus

• Subsoil

_______________ is made up of tiny bits of rock. You can see and feel the rocks with your fingers.

• Sand

• Clay

• Humus

• Loam

___________ is made up of very small bits of rock. They are too small to see with your eyes alone.

• Sand

• Humus

• Soil

• Silt

______________ is made up of teeny, tiny bits of rock. You cannot feel the rock with your fingers.

• Sand

• Clay

• Silt

• Soil

A Mixture of humus, sand, silt, and clay. It is used for growing plants.

• Sand

• Silt

• Loam

• Soil

substances that plants take in from the soil through their roots to help them grow and live.

• Soil

• Nutrients

• Sand

• Plants

The top layer has lots of humus. Ants and worms live here.

• Topsoil

• Subsoil

• Bedrock

This middle layer doesn’t have much humus. This layer has small rocks.

• Topsoil

• Subsoil

• Bedrock

This bottom layer is made up of solid rock.

• Topsoil

• Subsoil

• Bedrock

Which soil holds water the best?

• Sand

• Humus

• Clay