Soil and Geologic Resources Practice Test

Reorder the following from smallest particle size to largest particle size.

• sand

• silt

• gravel

• clay

• boulder

Reorder the following from top to bottom.

• Organic Layer

• Parent Rock

• eluviation layer

• Topsoil

• Subsoil

Reorder the following from top to bottom

• A Layer

• R Layer

• C Layer

• O Layer

• B Layer

Tags

NGSS.MS-ESS1-4

Reorder the following from bottom to top

• Humus

• Deposited minerals and metal salts

• minerals with Humus

• Partly weathered rock

• Leached minerals and organic matter

How many soil layers are there?

soil with the smallest particle size that holds too much water; needs nutrients

• Clay

• Soil

• Loam

• Sand

Dark nutrient rich part of soil that is made of recently decomposed material

• Clay

• Loam

• Top Soil

• Humus

Tags

NGSS.MS-LS2-1

allowing liquids or gases to pass through it

soil with small particle size that holds some water; some nutrients

• Clay

• Silt

• Sand

• Bed Rock

Deepest layer of the soil that has not been weathered