Soil!

Which of the following is NOT one of the three layers of soil?

• topsoil
• undersoil
• subsoil
• bedrock

Which layer of soil is on the top?

• topsoil
• subsoil
• bedrock
• dirt

What layer of soil is in the middle?

• topsoil
• bedrock
• minerals
• subsoil

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil

Which layer of soil has the BIGGEST pieces of rock in it?

• topsoil
• subsoil
• bedrock
• midsoil

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

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.

When there are not enough plants to hold topsoil in place, water and  _______ carry the topsoil away, leaving the subsoil exposed

• sunlight
• birds
• magnetic fields
• wind

The texture of soil depends mainly on

• the types of plants that grow in the soil.
• the size of the particles in the soil.
• the color of the soil.
• the number of worms in the soil.

Which of the following best describes soil erosion?

• A.  the breakdown of soil by chemicals
• A.  the improvement of soil quality by fertilizers
• A.  the breakdown of soil by drought
• A.  the movement of soil by wind or water