Lab: Environmental Changes in a Watershed Answers

Which processes relate to mechanical weathering? Check all that apply.freezing and thawingplant growthoxidationabrasionacid rain

✔ Area 1Area 2

Which material gives the soil its high fertility?

Which soil sample has a soil texture that is high in sand?

Examine the soil profile and use the drop-down menu to select what each label identifies. Label O Label A Label B Label C

✔ topsoilorganic material subsoil

topsoil ✔ subsoilweathered rock

organic material subsoil ✔ weathered rock

What materials combined to form the topsoil?

Soil classification is partially determined by the presence of organic material, such as humus. Which would have more humus—a desert or a forest—and why? Check all that apply.