Apes Soils Review

Which soil particles are the smallest?

• silt

• rocks

• clay

• sand

The MAIN  thing Decomposers do for the the soil is the following:

• Store moisture

• Burrow deep in the soil

• Make space for air and water

• Break down and digest dead organisms

Tags

NGSS.MS-LS2-3

Soil layers are called horizons because...

• The layers are all different

• The layers are vertical

• The layers are horizontal

• The layers are above one another

What are the proportions of sand, silt, and clay for the soil at point X?

• 5% Sand, 90% Silt, 5% Clay

• 5% Sand, 20% Silt, 5% Clay

• 65% Sand, 30% Silt, 10% Clay

• 60% Sand, 30% Silt, 10% Clay

Why might very old soil be nutrient poor in the picture above?

• more organic material is present

• plants and water leaching nutrients

• less biodiversity

• soil is compacted

Tags

NGSS.MS-LS2-3

What horizon is decomposed organic material and is most pronounced in forests

• O horizon

• A horizon

• E horizon

• D horizon

This soil layer is found in some acidic soils and it is where metals such as iron, aluminum, and other nutrients are leached from above.

• O horizon

• A horizon

• E horizon

• B horizon

Which type of soil has the highest water retention capacity?

• Sandy soil

• Clay soil

• Loamy soil

• Silty soil

What is the primary role of earthworms in soil ecosystems?

• Pollinate plants

• Decompose organic matter

• Aerate the soil

• Absorb nutrients

Tags

NGSS.MS-LS2-3

Which soil horizon is known for being rich in organic material and is often dark in color?

• A horizon

• B horizon

• C horizon

• O horizon