SOIL CLASS 7TH

soil is important for

• agriculture

• food

• plants

• All of the above

Which of the following best describes soil erosion?

• A.  the breakdown of soil 
• A.  the improvement of soil
• A.  the addition of soil
• A.  the movement of soil by wind or water

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Which layer of soil are these roots growing in?

• subsoil
• topsoil

The breaking down of rocks into smaller pieces.

• erosion
• weathering
• sediment
• sand

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 is NOT a layer of soil?

• bedrock
• topsoil
• undersoil
• subsoil

What living things are in soil?

• earthworms
• sand
• glass
• minerals

What do we call the layers of soil?

• Deposits
• Horizons
• Minerals
• Rocks

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil