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- 1. Multiple Choice
Humus is made up of what materials?
small bits of shells and bones
decomposing plants and animals
quartz and feldspar minerals
silt and clay
- 2. Multiple Choice
Soil is made of ---
weathered rocks and minerals.
dead plants and animals.
air and water.
all of the above
- 3. Multiple Choice
Which layer of soil is on the bottom of a soil profile?
topsoil
subsoil
bedrock
humus
- 4. Multiple Choice
Which of the following is NOT one of the three layers of soil?
topsoil
undersoil
subsoil
bedrock
- 5. Multiple Choice
What is the layer of soil just below the topsoil?
bedrock
subsoil
topsoil
humus
- 6. Multiple Choice
Which of the horizon layers forms LAST?
Weathered or decomposed rock (Horizon C)
Subsoil (Horizon B)
Topsoil (Horizon A)
- 7. Multiple Choice
Why is topsoil darker than all other levels of soil?
It contains all the darker colored minerals.
It contains volcanic rock.
It contains more organic matter.
It contains bits of burned trees.
- 8. Multiple Choice
What is the common name for Horizon A?
bedrock
topsoil
subsoil
- 9. Multiple Choice
What is the layer of soil that contains humus, leaf litter, and other organic matter called?
O - Organic
A - Topsoil
B - Subsoil
R - Bedrock
- 10. Multiple Choice
Why is soil an important natural resource?
soil is used to make buildings
soil can grow crops
soil comes from bedrock
soil is full of microbes
- 11. Multiple Choice
What is the origin of clay, silt, and sand?
humus
bedrock
subsoil
topsoil
- 12. Multiple Choice
Which layer is the parent material?
Horizon O
Horizon A
Horizon B
Horizon C
Horizon R
- 13. Multiple ChoiceTHIS LAYER CONTAINS UNWEATHERED SOLID ROCK AND IS BENEATH ALL OTHER LAYERS......HORIZON AHORIZON OHORIZON DHORIZON C
- 14. Multiple ChoiceSoil formation begins with the weathering oflitter.bedrock.the A horizon.humus.
- 15. Multiple ChoiceWhat is a soil problem all farmers face?soil hardeningsoil erosionsoil spoilingsoil pollution
- 16. Multiple Choice
What soil conservation method refers to forming steps in a hill to prevent water erosion?
windbreaks
contour plowing
terrace farming
strip cropping
- 17. Multiple Choice
How is most top soil held in place?
it isn't held in place
plants and their roots hold the top soil in place
nothing holds the soil down
animals help the top soil stay in place
- 18. Multiple Choice
What is soil conservation?
the management of land to prevent the loss of resources
the management of soil to help with the destruction
the management of soil to prevent destruction
the management of land to help the farmers make more money
- 19. Multiple Choice
What is crop rotation?
When you change the type of crop you plant every year
when you change the type of soil used for the plants
when you put a crop on a different plot of land each year
when you rotate the crops around the plot of land.
- 20. Multiple Choice
What is contouring plowing?
when farmers tour the lands and check on the crops
when farmers use things found in contouring makeup kits to help crops grow
when farmers plow their fields along curves of a slope
when farmers use straight lines through hills.
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