Soil Composition

Which of the horizons in the soil profile shown represent the organic material?

• Horizon O (Humus)

• Horizon A

• Horizon B

• Horizon C

Tags

NGSS.MS-LS2-3

A loose mixture of rock particles, organic material (humus), water, and air- forms from rock, support the growth of vegetation

• loam

• erosion

• soil

• A horizon

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-5

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

• clay

• sand

• silt

• mud

What is humus?

• soil

• organic matter

• loam

• minerals

Tags

NGSS.MS-LS2-3

Which of the following is the correct order of soil particles in order of increasing particle size?

• clay-sand-silt

• sand-clay-silt

• silt-clay-sand

• clay-silt-sand

If a soil ribbon is well over ​ (a)   inches, it indicates a ​ (b)   soil.

• two

• clay

• three

• four

• one

• silt

• sand

Match the following minerals to their descriptions

• silt

• large particles, low nutrient capacity, high drainage/low water capacity

• sand

• small particles, high nutrient capacity, low drainage/high water capacity

• clay

• medium particles, medium nutrient capacity, medium drainage/medium water capacity

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

• silt, sand, clay

• sand, silt, clay

• clay, sand, silt

• clay, silt, sand

Which layer is the parent material?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

Which layer is the subsoil?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R