Soil Formation and Composition

Which of the following orders sediment particle size from smallest to largest?

• silt, sand, clay

• sand, silt, clay

• clay, sand, silt

• clay, silt, sand

In which horizon do most animals such as bugs live?

• Humus

• Topsoil

• Subsoil

• Parent Material

• Bedrock

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which layer is the parent material?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

The dark organic material formed in soil from the decayed remains of plants and animals

• humus

• decomposer

• loam

• erosion

The horizon contains partly weathered rock

• C Horizon

• A Horizon

• B Horizon

• Bedrock

Tags

NGSS.MS-ESS2-1

The horizon is called the subsoil, usually consist of clay and other particles leached down from the A Horizon

• B Horizon

• A Horizon

• Erosion

• Bedrock

What is the first step in soil formation?

• Erosion

• Weathering

• Deposition

• Decomposition

Which of the following contributes to most of the organic remains found in humus?

• Plants

• Animals

• Rocks

• Minerals

What are the three different particles found in soil?

• Clay, sand, silt

• Dirt, air, marble

• Gravel, water, marble

• Dirt, air, water

Which of the following is the smallest particle you can find in soil?

• Sand

• Clay

• Silt

• Loam