Section #: 7.3
Formation of Soil
Practice Test
1.
Soil that has been moved to a location away from its parent rock is called __________.
a.
residual soil
b.
soil profile
c.
organic-rich soil
d.
transported soil
Hint
2.
What two variables control how fast a soil forms?
a.
type of parent rock and climate
b.
type and age of parent rock
c.
temperature and pressure
d.
residual vs. transported soil
Hint
3.
You find a soil sample with 50 percent sand, 20 percent silt, and 40 percent clay. Use the figure to determine the soil's texture.
a.
clay loam
b.
silt loam
c.
loam
d.
sandy clay loam
Hint
4.
__________ is the loose covering of broken rock particles and decaying organic matter that covers bedrock.
a.
regolith
b.
soil
c.
sediment
d.
a sedimentary rock
Hint
5.
How are soil textures classified?
a.
acidity
b.
grain size
c.
horizon
d.
climate
Hint
6.
Which type of soil has a high level of salt and can support only limited vegetation?
a.
a tropical soil
b.
a desert soil
c.
a temperate soil
d.
a polar soil
Hint
7.
What soil horizon has high concentrations of organic matter and humus?
a.
horizon A
b.
horizon Z
c.
horizon C
d.
horizon B
Hint
