Soil Properties Unit Exam

Soil horizons are a ____ of a soil profile.

Soil horizons are a layer of soil that forms from physical, chemical, and ______ properties.

• biological

• watering

• breakdown

• logical

Label the soil horizons in the correct order

a

b

c

d

e

f

Bedrock

Organic Layer

Eluviation Layer

Parent Rock

Topsoil

Subsoil

Match the following thickness to the correct horizon

• 45-90 cm

• organic layer

• 8-20 cm

• Topsoil

• any

• Parent Rock

• 0-60 cm

• Eluviation Layer

• 10-20 cm

• Subsoil

The organic layer consists of ______ leaves, twigs, and peat.

The organic layer is ​ (a)   or ​ (b)   in color.

• black
• dark brown
• red
• white

The topsoil is the most ____ rich layer.

The topsoil is ​ (a)   or ​ (b)   in color.

• dark brown
• black
• orange
• grey

The elevation layer is light colored from _______ _______.

Which soil horizon may not be present (found) in a soil sample?

• Topsoil

• Parent Rock

• Eluviation Layer

• Bedrock