Soil Layers

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 layers of soil?

• topsoil
• undersoil
• subsoil
• bedrock

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

• clay
• sand
• silt
• mud

Are there minerals in soil?

• Yes
• No

True or false:
We end up eating the minerals that are in soil.

• true
• false

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.

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.

Many plants cannot grow in sandy soil. Why is this true?

• Sandy soil does not hold enough water.
• Oxygen cannot pass through sandy soil.
• Roots cannot easily push through clay soil.
• Sandy soil has too many nutrients.

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus