Soils Envirothon Practice

The O Horizon contains mostly..

• Organic Matter

• Rocks

• Boulders

• Houses

Answer explanation

Remember that the O Horizon is made up mainly of organic matter such as leaf litter. A trick to remember..... O Horizon & (O)rganic.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Reorder the following soil layers from BOTTOM layer to TOP layer.

• Subsoil

• Parent Material

• Humus

• Topsoil

• Bedrock

Tags

NGSS.MS-LS2-3

Unweathered bedrock

• O Horizon

• A Horizon

• B Horizon

• C Horizon

• R Horizon

What are soil layers called?

• Rock

• Horizons

• Layers

• Profile

What location contains thicker O-horizons?

• Forests

• deserts

• grasslands

• ocean floor

What part of the soil is the A-horizon?

• subsoil

• bedrock

• topsoil

• rocks

What is the process by which rock is broken down into smaller particles by exposure to the elements?

• Weathering

• Erosion

• Profiling

• Deconstructtion

Which climate type would produce the thinnest top soils

• warm wet

• cold wet

• warm dry

• cold dry

What is a floodplain?

• The area near a river that floods when water levels get to be too high.

• The area near a river that looks boring or dull.

• The process of water levels going over a river or stream bank.

• Water gathering on the surface of the Earth because it doesn't seep into the ground.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

NGSS.MS-ESS3-2

Which particles will be transported by a stream moving at a velocity of 5 cm/s?

• pebbles, sand, silt, and clay, only

• sand, silt, and clay, only

• silt and clay, only

• clay, only