Soil & Agriculture

What's the composition of soil?

• air, water, minerals

• minerals, decayed organic materials, rock particles

• air, water, decayed organic materials, rock particles, minerals

• decayed organic materials, rocks particles, and minerals

Soil formation begins with the weathering of 

• litter.
• bedrock.
• the A horizon.
• humus.

Tags

NGSS.MS-ESS2-2

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

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

Look at the diagram.

Which layer contains the majority of the bacteria,fungi, worms, and other organic matter?

• Z

• Y

• X

• W

Tags

NGSS.MS-LS2-1

Which layer is the parent material?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

Why is soil an important natural resource?

• soil is used to make buildings
• soil can grow crops
• soil comes from bedrock
• soil is full of mircobes

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-5

The two main factors that determine the rate of weathering are the TYPE of rock and_____.

• Music
• Climate
• Size of rock
• Weight of rock

The texture of soil depends on the:

• mass
• water in the soil
• plants growing in the soil
• composition of the soil

Topsoil is considered to be most fertile when it has:

• low PH level
• low sand content
• high organic matter level
• high parent rock material level

Tags

NGSS.MS-LS2-1

Soil will pack down over which decreases the ability of the soil to hold water.  Which animals would best help the soil hold water?

• earthworms making tunnels under the surface
• cattle making depressions with their hooves
• horses making trenches when they gallop
• sheep pulling up plants by their roots