Florida Science Grade 6

Section 2: The Nature of Soil

The Nature of Soil

1.
A soil's composition is dependent on weathering because __________.
A)it makes the soil more fertile
B)it contributes sediment to the soil
C)it keeps the soil moist
D)it moves the topsoil to other areas where it is more needed
2.
Soil is a mixture of __________.
A)weathered rock and water
B)decayed organic matter and oxygen
C)mineral fragments
D)all of the above
3.
Decayed organic material turns into a dark colored material called ___________.
A)litter
B)clay
C)humus
D)soil
4.
Each layer of a soil profile is called a __________.
A)horizon
B)horizontal
C)humus
D)litter
5.
In which horizon of a soil profile is litter usually found?
A)horizon C
B)horizon B
C)horizon A
D)horizon D
6.
In which horizon of a soil profile does leaching normally occur?
A)horizon C
B)horizon B
C)horizon A
D)horizon D
7.
In which horizon of a soil profile is the parent material usually found?
A)horizon B
B)horizon C
C)horizon A
D)horizon D
8.
How can rock type within the parent rock affect the type of vegetation that grows there?
A)Different rocks provide different root stability for plant growth.
B)Different rocks create different depths of parent rock that affect plant growth.
C)Different rocks make water absorption more difficult.
D)Different rocks provide different nutrients for plant growth.
9.
Climate affects soil types; for instance, prairie soils have __________.
A)thinner A and B horizons due to leaching, which is promoted by rainfall
B)thin, lightly colored A horizons because of the lack of vegetation
C)granitic C horizons because little or no grass grows there
D)thick, dark, A horizons because of all the grasses that contribute organic materials
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.