Soil Horizons & Formation

Unweathered bedrock

• O Horizon

• A Horizon

• B Horizon

• C Horizon

• R Horizon

Organic materials dominate this horizon

• O Horizon

• A Horizon

• B Horizon

• C Horizon

• R Horizon

Tags

NGSS.MS-LS2-3

When you buy topsoil, you are buying this horizon

• O Horizon

• A Horizon

• B Horizon

• C Horizon

• R Horizon

What is the correct order of horizons?

• OABECD

• OAEBCR

• OABCER

• OABCDE

Climate can affect the soil formation in an area.

• True

• False

About how long does it take to form 1 cm of soil?

• 250 years

• 2000 years

• 10 years

• 250 million years

Young soil forms before the bedrock rock is weathered.

• True

• False

Which biome has the thickest A horizon?

• Temperate Forest

• Rainforest

• Desert

• Grasslands

Why doesn't the rainforest have a thick O horizon?

• This is wrong, it does have a thick O Horizon

• Things decay too quickly and are recycled.

• There is not enough rainfall.

Tags

NGSS.MS-LS2-3

What is the arrangement of soil horizons called? (What did you make in class?)

• Soil Layers

• Horizon Columns

• Soil Profile

• Horizon Layers