Soils/Ecosystems

The ______________ of the land is usually expressed as a percentage by dividing the____________ drop by the ____________ distance and multiplying by 100.

• vertical,slope,horizotal

• horizontal,vertical,slope

• slope,vertical,horizontal

• slope,horizontal,vertical

what is soil?

• mulch

• mud

• plants and food

is an ecosystem a group of organisms and their physical environment.

• True

• fales

what is soil erosion?

• water and wind moving

• dancing wind

• the removal of soil by water and wind

what are the types of soil erosion?

• Sheet erosion,Rile erosion,Gul erosion,and saleblows erosion

• Sheep erosion,Rake erosion,Gulit erosion,and Stabel erosion

• Sheet erosion,Rill erosion,Gully erosion,and Sandblows

which erosion is the gradual and fairly uniform removal of surface soil?

• Rill erosion

• Sheet erosion

• sandbowles

• Gully erosion

what is the result of sandblows?

• rills have become extreamly large

• removal of surface soil

• wind picking up soil particles and carrying them away

___________provieds the fertile root zone in which crops and other plants can grow.

• Topsiol

• potsiol

• Topsoil

• loispot

which can damage soil?

• Floods

• Sand

• Other sediment

• all of the above

Soil includes _____________,_____________materials and living_____________

• Minerals,organisms,organic

• Organic,organisms,minerals

• Minerals,organic,organisims