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- 1. Multiple Choice
Soil is formedvery quicklyafter a few weeksover thousands of yearsby magic - 2. Multiple Choice
Which one affects the rate at which a rock weathers?
Surface area
Texture
Pore space
Contour
- 3. Multiple Choice
Chemical weathering changes a rock's...
Texture
Composition
Exfoliation
Pore Space
- 4. Multiple Choice
In what part of the soil profile is the organic material found in?
C horizon, deepest layer of soil
B horizon, material washed down from above
A horizon, upper layer of soil
layer of dead leaves on the surface of the ground.
- 5. Multiple Choice
Weathering is the physical or chemical breakdown of what?
water
rocks
humus
chemicals
- 6. Multiple Choice
It is difficult fro water to move through soil that has...
Little or no pore space
A high sand content
Mostly large particles
Many earthworms and ant homes
- 7. Multiple Choice
Most of the matter that breaks down to form humus comes from what?
Minerals
Plants
Rocks
Clay
- 8. Multiple Choice
The process in which something is worn down by rubbing one object or surface against another is called?
Exfoliation
Abrasion
Rotation
Tumbling
- 9. Multiple Choice
The way that water in the soil dissolves nutrients depends upon what?
Color of the soil
Chemistry of the soil
Pore space of the soil
Texture of the soil
- 10. Multiple Choice
What is the main component of soil?
Humus
Water
Air
Rock particles
- 11. Multiple ChoiceThe texture of soil depends mainly onthe types of plants that grow in the soil.the size of the particles in the soil.the color of the soil.the number of worms in the soil.
- 12. Multiple Choice
When you dig a deep hole in the ground, you might notice that the deeper soil looks different. Which statement best describes what you would see in Horizon C?
Large and least weathered rock particles
Topsoil
Clay and minerals
Organic material such as leaves and sticks
- 13. Multiple Choice
Why do tropical, desert, temperate, and arctic soils all have different characteristics?
landforms
climates
horizons
abrasions
- 14. Multiple Choice
Which type of soil has the lowest permeability?
gravel
clay
sand
humus
- 15. Multiple Choice
A fast flowing river wears away small particles from the rocks in its bed. This is an example of what?
exfoliation
texture
rotation
abrasion
- 16. Multiple Choice
The darker the soil the more...............it has
sand
clay
water
nutrients
- 17. Multiple Choice
The breakdown of rock by acidic water is an example of what?
chemical weathering
mechanical weathering
abrasion
exfoliation
- 18. Multiple Choice
A rock will weather more quickly in a hot, wet environment than in a cold, dry environment. This is an example of how...
climate affects soil formation
climate affects rock formation
Landforms affect soil formation
Landforms affect rock formation
- 19. Multiple Choice
By breaking down rocks with their roots, plants commonly cause what?
chemical weathering
mechanical weathering
exfoliation
abrasion
- 20. Multiple Choice
A soil that has a high porosity would most likely contain:
silt
sand
humus
gravel/pebbles
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