EH Quiz 4: Soil

Soil horizon A is what soil layer?

• Organic matieral

• Topsoil

• Subsoil

• Bedrock

Bedrock is the ______ soil layer.

• Bottom

• Top

Which of the following are examples of how humans cause erosion? Select all that apply.

• Planting trees

• Overgrazing livestock

• Construction

• Farming

How long does it take to make 1 cm of soil?

• 150 minutes

• 150 months

• 200 days

• 200 years

Which of the following is the correct order for soil formation?

• parent material, weathering, erosion, deposition

• parent material, deposition, erosion, weathering

• deposition, erosion, weathering, parent material

• weathering, parent material, deposition, erosion

What is found in soil horizon B?

• rocks, minerals, little humus

• lots of humus, minerals

• parent material, humus

• organic mater

Weathered parent material (rock) is what horizon?

• A

• B

• C

• O

Which horizons contain humus (in any quantity)? Select all that apply.

• A

• B

• C

• O

Erosion occurs when

• sediment is transferred

• sediment is deposited

• sediment is broken down

Which of the following is an example of physical weathering?

• Abrasion

• Acid Rain

• Oxidation (rust)

• Lichens