Envirothon Soil

Which layer is the bottom of the soil profile?

• C - Partially Weathered Parent Material

• D - Separated rock

• R - Bedrock

• A - Topsoil

Layers of soil are also known as:

• Soil Profiles

• Soil Horizons

• Soil sheets

• Soil cores

In which layer of the soil profile contains a solid layer of rock?

• Layer 1 (A)

• Layer 2 (B)

• Layer 3 (C)

• Layer 4 (R)

Tags

NGSS.MS-ESS2-1

Which soil layer consists of clay, iron oxides, and other components that came form the zone of leaching?

• O horizon

• A Horizon

• B Horizon

• Bedrock

Soil sample that is 10% clay, 20% silt, and 70% sand has which texture?

• clay

• clay loam

• sandy loam

• silt

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

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