Soil Test Review

What are soil layers called?

• Rock

• Horizons

• Layers

• Profile

In which horizon do most animals such as bugs live?

• Humus

• Topsoil

• Subsoil

• Parent Material

• Bedrock

What is decayed organic material in soil?

• topsoil

• humus

• subsoil

• bedrock

Which layer is the subsoil?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

This is found in the topsoil and is made of decaying plants and animals. 

• dirt
• water
• humus
• subsoil

The top layer of soil is called ________.

• bedrock
• topsoil
• subsoil
• grass

Soil is made of ---

• weathered rocks and minerals.

• dead plants and animals.

• air and water.

• all of the above

Which layer of soil is on the bottom of a soil profile?

• topsoil

• subsoil

• bedrock

• humus

Humus is ---

• the dead parts of plants and animals in soil.

• A food we eat with pretzels.

• The tiny particles inside of soil.

• The roots that come off of a plant and live in soil.

Which layer of soil are these roots growing in?

• subsoil
• topsoil