Soil, Weathering & Erosion Oh My!

A vertical section of soil that shows the layers is called a

• soil profile
• bedrock
• erosion

Decayed organic material in soil is called______.

• Litter
• Silt
• Humus
• Clay

Topsoil which contains the HUMUS is the soil layer best for growing plants.

• True
• False

Which horizon is made up of partially weathered rocks?

• Horizon A
• Horizon B
• Horizon C

In which horizon is most of the HUMUS?

• Horizon A
• Horizon B
• Horizon C
• Horizon D or R

Soil's one of the Earth’s most valuable resources. Everything on Earth depends on soil somehow.

• True
• False

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil

Soil is made of

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

What is soil?

• A mixture of minerals
• A mixture of water, minerals, gases and organic matter
• A type of rock
• A type of bacteria

When rocks are broken down into smaller pieces

• erosion
• weathering
• sediment