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- 1. Multiple Choice
Which type of soil has the lowest rate of permeability?
sand
silt
clay
loam
- 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
Humus is ---
the dead parts of plants and animals in soil.
A food we eat with pretzels.
The tiny particles inside of soil.
The roots that come off of a plant and live in soil.
- 6. Multiple Choice
When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?
sand
silt
clay
humus
- 7. Multiple Choice
What is the layer of soil just below the topsoil?
bedrock
subsoil
topsoil
humus
- 8. Multiple ChoiceWhich layer of soil are these roots growing in?subsoiltopsoil
- 9. Multiple Choice
Horizontal layers of soil are called ---
Soil profiles
Soil horizons
- 10. Multiple Choice
The texture of soil depends mainly on ---
the 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.
- 11. 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
- 12. 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.
- 13. Multiple Choice
Where does most of the water go when it rains?
In the ocean
In the rivers
In the gutters
It absorbs into the soil.
- 14. Multiple Choice
What is the common name for Horizon A?
bedrock
topsoil
subsoil
- 15. 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
- 16. Multiple ChoiceWhich describes the soil layers in order from the surface?top soil, bedrock, horizon C, subsoiltop soil, subsoil, horizon C, bedrocktop soil, horizon C, subsoil, bedrock
- 17. Multiple ChoiceWhat are the four soil components?Sand, rock, humus, airRock, humus, air, waterRock, humus, roots, waterRock, humus, animals, plants
- 18. Multiple ChoiceWhich factors are primarily responsible for decomposition of organic materials in soil?Animal action and plant actionAnimal action and fungus actionFungus action and microorganismsMicroorganisms and animal action
- 19. Multiple ChoiceDoes the vertical cross-section of soil in the picture show a soil profile or a soil horizon?Soil ProfileSoil Horizon
- 20. Multiple Choice
Permeability is...
when soil gets carried away
when soil is broken down by wind, water, or ice
how fast water travels through the soil
how much water the soil holds
- Answer choicesTagsAnswer choicesTags