Soil Composition

Soil includes loose _______ and organic material in which plant roots can grow.

• weathered rock

• solid rock

• metal fragments

• plastic debris

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What percentage of soil composition is made up of air?

• 20%

• 25%

• 30%

• 35%

What is the largest component of soil composition according to the pie chart?

• Air

• Water

• Mineral Particles

• Organic Matter

Fill in the blank: According to the pie chart, water makes up ____% of soil composition.

• 25%

• 30%

• 40%

• 50%

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

What percentage of organic matter is made up of humus?

• 50%

• 60%

• 70%

• 80%

Fill in the blank: Organic matter makes up ____% of the total soil composition.

• 5%

• 10%

• 15%

• 20%

What is residual soil? Fill in the blank: Residual soil is formed when the parent rock is the bedrock beneath the soil and the soil has ________.

• not moved.

• been transported by water.

• been transported by wind.

• been transported by glaciers.

What is transported soil? Fill in the blank: Transported soil forms from parent material left by winds, rivers, glaciers, or soil that ________ from its original location. This soil has been transported by erosion and deposition.

• was moved.

• remained stationary.

• was formed in place.

• was unaffected by erosion.

Tags

NGSS.MS-ESS3-1

What is the topmost layer of the soil profile called?

• O Horizon

• B Horizon

• C Horizon

• R Horizon

Which layer of the soil profile is located at a depth of 10 inches?

• Topsoil

• Subsoil

• Bedrock

• Organic layer