Soil

A mixture of weathered rock, organic material, water and air is...

• a mineral

• a sedimentary rock

• soil

• the bedrock

One of the agricultural uses of soil is to produce...

• micro-organizms

• biomass energy

• foundations for buildings

• produce litter

The most important factor affecting soil formation is

• climate

• topography

• type of parent rock

• time

The thinnest soils would be found

• at the base of a cliff

• on a steep mountain side

• in a low valley

• near a river

What agent of weathering is most active in producing laterites?

• mechanical weathering

• chemical weatering

• ice wedging

• abrasion

You are in a temperate forest with many large trees. About how long has the soil there been forming?

• 10's of years

• 100s of years

• 1000s of years

• 10000s of years

What is the most likely material lining the retention pond at the high school?

• gravel

• sand

• clay

• asphalt

The A horizon is also known as the

• topsoil

• subsoil

• regolith

• bedrock

You are digging a hole and the shovel turns up red clay. About how deep is the hole (so far)?

• less than 10 inches

• about 2 inches

• a little over 10 inches

• there is no way to even guess

Soils supply a foundation for plant roots and (select all that apply) for healthy plant growth.

• water

• nutrients

• leaching agents

• hypernatation solids