Multiple Choice
Identify the choice that best completes the
statement or answers the question.
|
|
|
1.
|
Decayed organic material turns into a dark colored material called
___________.
a. | litter | c. | humus | b. | clay | d. | soil |
|
|
|
2.
|
The B horizon is ____.
a. | rockier than the C horizon | c. | lighter in color than the A
horizon | b. | richer in humus than the A horizon | d. | thinner than the C
horizon |
|
|
|
3.
|
Each layer of a soil profile is called a __________.
a. | horizon | c. | humus | b. | horizontal | d. | litter |
|
|
|
4.
|
 Which of these layers would contain the most
humus? a. | A | c. | C | b. | B | d. | all have the same
amount |
|
|
|
5.
|
Soil is a mixture of weathered rock, mineral fragments, water, air and
____.
a. | sand | c. | moss | b. | decayed organic matter | d. | clay |
|
|
|
6.
|
The ____ horizon has smaller rock and mineral particles than the other
layers.
|
|
|
7.
|
The rock and mineral fragments in soil come from rock that has been ____.
a. | blasted | c. | weathered | b. | carved | d. | chemically
treated |
|
|
|
8.
|
Minerals found in the B horizon were dissolved in water and carried there by a
process called ____.
a. | oxidation | c. | weathering | b. | leaching | d. | littering |
|
|
|
9.
|
The organic matter in humus is made of ____.
a. | dead worms | c. | roots | b. | plant stems | d. | all of the
above |
|
|
|
10.
|
The layer of soil that contains the most organic material is called the ____
horizon.
|
|
|
11.
|
 In which horizon
of a soil profile does leaching normally occur? a. | A | c. | C | b. | B | d. | neither of
these |
|
|
|
12.
|
Litter often covers the ____ horizon.
a. | A | c. | C | b. | B | d. | all of the
above |
|