APES 4.2 Soil Formation and Properties

What is the largest component of soil by percentage?

• Air

• Water

• Mineral Particles

• Organic Matter

Soil is formed from decaying organic matter from 'above' and _______ from 'below'.

• weathered parent bedrock material

• mineral particles

• water

• air

Which of the following is an example of parent material that is nutrient-poor?

• A) Quartz

• B) Calcium carbonate

• C) Limestone

• D) Sandstone

The steeper the landscape, the ______ the erosion.

• lower

• higher

• same

• none

Tags

NGSS.MS-ESS2-2

Which of the following is a service provided by soil organisms?

• Increasing soil temperature

• Breaking down toxic materials

• Reducing soil porosity

• Increasing soil acidity

Fill in the blank: In the soil horizon diagram, the layer labeled 'A horizon' is also known as ______.

• Topsoil

• Subsoil

• Bedrock

• Parent material

What is the percent of clay in a soil sample with 10% sand and 83% silt?

• 7%

• 10%

• 17%

• 83%

_____ is the smallest soil particle.

• Sand

• SIlt

• Clay

This soil horizon is referred to as the "sub-soil"

• A Horizon

• B Horizon

• C Horizon

• R Horizon

What soil texture will I have with 15% clay, 25% sand, and 60% silt?

• Loam

• Silty, clay, loam

• Sandy loam

• Silt loam