What is the common name for Horizon A?

• bedrock
• topsoil
• parent material
• subsoil

What is humus?

• organic material rich in nutrients
• subsoil
• parent material
• trees

Tags

NGSS.MS-LS2-3

What is the main purpose of microbes in the soil?

• to release the nutrients in rocks
• to cause disease
• to feed animals

Tags

NGSS.MS-LS2-3

Which describes the soil layers in order from the surface?

• top soil, bedrock, horizon C, subsoil
• top soil, subsoil, horizon C, bedrock
• top soil, horizon C, subsoil, bedrock

What process breaks down bedrock to begin soil formation?

• leaching
• weathering
• decomposition
• humus

Tags

NGSS.MS-ESS2-2

Soil is made of ---

• weathered rocks and minerals.

• dead plants and animals.

• air and water.

• all of the above

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Which layer of soil is on the bottom of a soil profile?

• topsoil

• subsoil

• bedrock

• humus

Tags

NGSS.MS-ESS2-1

The texture of soil depends mainly on ---

• the types of plants that grow in the soil.

• the size of the particles in the soil.

• the color of the soil.

• the number of worms in the soil.

Soil that allows water to pass through it is considered to be _______________.

• groundwater

• permeable

• runoff

• impermeable

Tags

NGSS.MS-ESS2-4

Grant tests the water retention of three types of soil- clay, sand, and potting soil. He pours 100 mL of water into each. From soil A, 32 mL drains out. From soil B, 85 mL drains out. From soil C, 17 mL drains out. Which soil sample (A, B, or C) is most likely the clay?

• Soil A

• Soil B

• Soil C

• There isn't enough evidence to tell.