Soil

Front

Humus is made up of what materials?

Back

decomposing plants and animals

Front

What is soil made of?

Back

Weathered rocks and minerals, dead plants and animals, air and water.

Front

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

Back

bedrock

Front

Which of the following is NOT one of the three layers of soil? topsoil, undersoil, subsoil, bedrock

Back

undersoil

Front

What is the layer of soil just below the topsoil?

Back

subsoil

Front

Which of the horizon layers forms LAST?
Options: Weathered or decomposed rock (Horizon C), Subsoil (Horizon B), Topsoil (Horizon A)

Back

Subsoil (Horizon B)

Front

Why is topsoil darker than all other levels of soil?

Back

It contains more organic matter.

Front

What is the common name for Horizon A?

Back

topsoil

Front

What is the layer of soil that contains humus, leaf litter, and other organic matter called?

Back

O - Organic

Front

Why is soil an important natural resource?

Back

Soil can grow crops.