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Weathering, Erosion, And Soil Formation
Test Description: Weathering, Erosion, and Soil Formation
Instructions: Answer all questions to get your test result.
1) What organism is primarily responsible for mixing the humus in the soil?
A
earthworms
B
roly poly bugs
C
squirrels
D
roaches
2) In which soil layer would you expect to find the most humus?
A
A horizon
B
C horizon
C
bedrock
D
B horizon
3) What is loam?
A
a type of soil with almost equal parts of sand, silt, and clay - it's the ideal soil
B
a type of soil that is only found in the B horizon
C
a type of soil made of mostly sand and air
D
a type of soil made of mostly clay
4) What type of weathering is BEST at weathering marble and limestone?
A
acid rain
B
ice wedging
C
oxidation
D
carbonic acid
5) Why do farmers leave the weeds and stalks of the previous year's crop in the ground during conservation plowing?
A
The dead material retains moisture, adds nutrients, and prevents erosion.
B
They are too lazy to plow it the right way.
C
The dead material prevents birds from stealing the seeds.
D
The dead material prevents water from soaking into the ground.
6) Where does humus come from?
A
Farmers must add it to the soil because it doesn't exist in nature.
B
nobody really knows
C
the organic remains of plants and animals
D
the grocery store
7) Rust forms from the oxidation of what metal?
A
copper
B
aluminum
C
iron
D
silver
8) Why do farmers use crop rotation?
A
to prevent the soil from getting too many organisms
B
to prevent soil exhaustion
C
to prevent the formation of litter
D
to prevent the formation of humus
9) What is soil exhaustion?
A
when the soil is too fertile
B
when the soil has too much water
C
when the soil has too much litter
D
when the soil is no longer fertile
10) What is the name for the top layer of soil?
A
C horizon
B
A horizon
C
B horizon
D
Bedrock
11) What is the name for the 2nd layer of soil?
A
C horizon
B
Bedrock
C
B horizon
D
A horizon
12) What is the name for the 3rd layer of soil?
A
B horizon
B
bedrock
C
A horizon
D
C horizon
13) What is the bottom layer of solid rock beneath the soil called?
A
A horizon
B
B horizon
C
C horizon
D
bedrock
14) What is another name for the A horizon?
A
topsoil
B
bedrock
C
subsoil
D
midsoil
15) What is another name for the B horizon?
A
topsoil
B
subsoil
C
midsoil
D
litter
*select an answer for all questions
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