CHECK ANSWERS PLEASE
5. In Figure 5-2, the layer labeled X in this diagram is called what? *
1 point
topsoil or A horizon********
subsoil or B horizon
C horizon or partially weathered bedrock
D horizon or solid bedrock
6. Which of the following is NOT a component of soil? *
1 point
mineral matter
large rocks*********
water and air
organic matter
7. Because of human activity, the current rates of soil erosion are _____ than in the past. *
1 point
faster*******
slower
the same
more intermittent
8. The movement of material down-slope is caused by the force of _________. *
1 point
weathering
snow
gravity******
water
9. Which is an example of chemical weathering? *
1 point
frost wedging******
reactions with oxygen
roots breaking apart rock
creep
10. As gravity influences a stream, water flows _______________ . *
1 point
from the ocean to higher elevation
downhill from land to sea
from sea to shining sea
downhill from mouth to headwater*******
11. As a river gets closer to base level, near the mouth, the discharge _________ . *
1 point
increases
decreases
stays the same******
12. This type of glacier looks like a stream of ice high in the mountains. *
1 point
continental ice sheet
iceberg
valley glacier*****
polar ice cap
13. What causes most of the erosion in desert areas? *
1 point
wind**********
water
gravity
sand
14. What is the main type of weathering in deserts? *
1 point
chemical weathering from oxidation
mechanical weathering during flash floods****
weathering by organic acids
biological activity