Soil Formation and Conservation

What type of process forms soil?

• weathering
• erosion
• deposition
• compaction

What is humus?

• soil
• organic matter
• loam
• minerals

Tags

NGSS.MS-LS2-3

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

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

What are the layers in soil called?

• Layers
• Horizons
• Gradients
• Profiles

Which of the following describes how well soil can grow plants?

• soil texture
• soil fertility
• soil structure
• soil arrangement

Tags

NGSS.MS-LS1-5

What most likely happens to soil when crops are not rotated from year to year?

• The soil nutrients are depleted
• The soil fertility increases
• The soil becomes more porous
• The soil erodes less rapidly

Tags

NGSS.MS-LS1-5

What type of erosion is slowed down by contour plowing and terracing?

• wind
• water
• air

What is the first step of soil formation?

• humus decomposing
• nitrates being absorbed by the plant roots
• weathering of parent rock
• climate changing

The C soil horizon contains

• humus
• leached materials and little to no humus
• partially weathered parent rock

The B soil horizon contains

• humus
• leached materials and little to no humus
• partially weathered parent rock