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- 1. Multiple Choice
Select two reasons why soil is important.
Soil is a mixture of different things.
Virtually all of our food supply depends on soil.
The organic matter consists of the decayed remains of organisms, including plants and animals.
Soil contains the food, air, and water that plants need to grow.
- 2. Multiple Choice
What is something that people who work with soil can do to maintain soil quality
We can *not* plant on soil.
We can put lots of chemicals on it.
We can grow the same crops every year in the same area.
We can also be careful about what chemicals we put on it.
- 3. Multiple Choice
Which is NOT found in all soil?
sand
silver
clay
silt
- 4. Multiple Choice
Which is NOT a factor that determines what type of soil forms in certain areas?
animals
slope
climate
types of plants
- 5. Multiple Choice
Where does soil come from?
Sand and leaves.
Weathered rock particles and humus mix with air and water
Weathered trees mix with decomposing animals.
Clay and silt.
- 6. Multiple Choice
How long does it take soil to form?
ten years
one hundred thousand years
one hundred years.
hundreds to thousands of years
- 7. Multiple Choice
Soil is classified as a non-renewable resouce. True or False?
True
False
- 8. Multiple Choice
Soil is the same everywhere in the world. True or False?
True
False
- 9. Multiple Choice
Which is NOT a color of soil?
yellow
red
green
black
- 10. Multiple Choice
The longer it takes a soil to form, the _______ it will be.
thicker
thinner
smellier
stickier
- 11. Multiple Choice
Where is chemical weathering most effective?
hot, dry climates
hot, wet climates
cold, wet climates
cold, dry climates
- 12. Multiple Choice
Physical weathering is more important in which climate?
hot and dry
hot and wet
cold and dry
cold and wet
- 13. Multiple Choice
"A tablespoon of soil contains more organisms than there are people on Earth." True or False?
True
False
- 14. Multiple Choice
Which particles in soil are the largest?
clay
silt
sand
organisms
- 15. Multiple Choice
Why does soil on steep slopes tends to be thinner and less developed than soils on level ground?
erosion
plants and animals
weathering
climate
- 16. Multiple Choice
__________ means that farmers plant different crops on different areas of land each year
chemical weathering
physical weathering
conservation practices
crop rotation
- 17. Multiple Choice
____________ affect the types of minerals that are in a soil.
rock types
climate
animals & plants
crop rotation
- 18. Multiple Choice
We all can help soil quality by keeping it covered with _________.
chemicals
animals
plants
water
- 19. Multiple Choice
Soil that is not covered with plants can be easily ________ by wind and water
eroded
conserved
examined
mixed
- 20. Multiple Choice
As plants and other organisms die and decompose, their remains change to a dark organic material called _________.
matter
soil
humus
particles
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