Soil Erosion Ck12 13.6-13.10

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

NGSS.MS-LS2-1

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

• 250 years

• 2000 years

• 10 years

• 250 million years

Tags

NGSS.MS-ESS2-2

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

When there are not enough plants to hold topsoil in place, water and  _______ carry the topsoil away, leaving the subsoil exposed

• sunlight
• birds
• magnetic fields
• wind

How can farmers prevent/slow down soil erosion?

• Cover their crops with a tarp 
• Water the soil everyday in order to weigh it down 
• Plant crops, plants, etc. to hold the soil in place
• Cut down all of the trees and crops. 

Tags

NGSS.MS-LS2-5

Soil conservation includes all of the following EXCEPT_______.

• Desertification
• Contour plowing
• Terracing
• Crop rotation

Tags

NGSS.MS-LS2-5

What soil conservation technique is this?

• Crop Rotation
• Wind Breaks
• Contour Plowing
• No-Till Farming

Tags

NGSS.MS-LS2-5

NGSS.MS-ETS1-1

Which type of soil conservation strategy is being  used in this picture?

• windbreakers
• contour farming
• planting of vegetation
• terracing