SOIL PROFILE AND SOIL FORMATION

Soil is a loose mixture of:

• Organic materials.

• Organic and inorganic materials.

• Dead and decaying micro organisms.

Tags

NGSS.MS-LS2-3

Layers of soil are also known as:

• Soil Profiles
• Soil Horizons
• Soil sheets
• Soil cores

Tags

NGSS.MS-ESS2-1

Soil formation begins with the weathering of 

• litter.
• bedrock.
• the A horizon.
• humus.

Tags

NGSS.MS-ESS2-2

Which of the horizons in the soil profile shown represent the organic material?

• Horizon O (Humus)
• Horizon A
• Horizon B
• Horizon C

In which horizon do most animals such as bugs live?

• Humus

• Topsoil

• Subsoil

• Parent Material

• Bedrock

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which layer is the parent material?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

The horizon contains partly weathered rock

• C Horizon
• A Horizon
• B Horizon
• Bedrock

Tags

NGSS.MS-ESS2-2

The horizon is called the subsoil, usually consist of clay and other particles leached down from the A Horizon

• B Horizon
• A Horizon
• Erosion
• Bedrock

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

It can take a long time for soil to form. Which are the primary factors that affect soil formation?

• rainfall, temperature, wind, time, and plants

• time, climate, topography, plants, and animals

• parent rock, sunshine, plants, animals, and bacteria

• climate, parent rock, topography, living things, and time

Select the definition of soil

• layers of soil with distinct physical properties in a soil profile

• mixture of weathered rock, organic material, water, and air

• decomposed organic matter

• vertical section showing the soil horizons