Soil Formation

What is the first step in soil formation?

• Erosion

• Weathering

• Deposition

• Decomposition

What type of environment does weathering happen the quickest?

• Dry and hot

• Dry and cold

• Wet and hot

• Wet and cold

Which of the following contributes to most of the organic remains found in humus?

• Plants

• Animals

• Rocks

• Minerals

Tags

NGSS.MS-LS1-6

What are the three different particles found in soil?

• Clay, sand, silt

• Dirt, air, marble

• Gravel, water, marble

• Dirt, air, water

Which of the following is the smallest particle you can find in soil?

• Sand

• Clay

• Silt

• Loam

What is the biggest particle you can find in soil?

• Sand

• Silt

• Clay

• Loam

What type of soil is an equal mixture of sand, silt, and clay?

• Sandy soil

• Loam

• Clay soil

What are some of the main soil decomposers?

• Fungi, bacteria, worms

• Foxes, deer, voles

• Bacteria, snakes, groundhogs

• Rats, squirrels, rabbits

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Which soil horizon is usually called "topsoil" and contains primarily humus.

• Horizon O

• Horizon A

• Horizon B

• Horizon C

Scientists classify soil into types based on characteristics like what?

• Rocks, weather, food sources

• Food webs, climate, plants

• Climate, plants, soil composition

• Climate, food sources, predators