Soil

Which of the following orders sediment particle size from smallest to largest?

• silt, sand, clay
• sand, silt, clay
• clay, sand, silt
• clay, silt, sand

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

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

Tags

NGSS.MS-LS2-1

In which horizon do most animals such as bugs live?

• Humus

• Topsoil

• Subsoil

• Parent Material

• Bedrock

Which layer is the parent material?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

Which layer is the subsoil?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

Pale coloured and has large particles. These create lots of small air gaps. Water drains through them easily so it usually feels dry.

• Soil

• Sand

• Clay

• Chalk

• Peat

Sticky and has small particles. This soil contains very few air gaps and water does not drain through it easily.

• Soil

• Sand

• Clay

• Chalk

• Peat

What does pH tell you about the soil?

• How acidic the soil is.

• How basic the soil is.

• How neutral the soil is.

• All of these answers!

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

If we find today that the soil is too acidic (below 4.5), how might that affect the number of species we find?

• We may find a lot more species as animals like acidic soil.

• We may find a lot less species as animals like very basic soil.

• We may find less species as will not grow well and reproduce in very acidic soil.

• There should be no measurable effect.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How does nutrients necessary for plant growth get in the soil?

• Soil absorbs sunlight.
• Soil is exposed to oxygen.
• Organic matter is decayed in the soil
• Water flows through the soil.