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- 1. Multiple Choice
What is soil made up of?
Just decomposed organic material
Just weathered rocks
Weathered rock and decomposed organic material
Just dead plants
- 2. Multiple Choice
What is decomposed organic material?
Broken down remains of plants and animals (humus).
Plants and animals that are still alive.
Anything in the grocery store that's healthy.
Broken down rocks and minerals.
- 3. Multiple Choice
What's a synonym for decomposed organic material?
Dirt
Soil
Humus
Mineral
- 4. Multiple Choice
Which layer contains the most decomposed organic material (humus) and the smallest rocks?
Bedrock
Subsoil (Horizon B)
Topsoil (Horizon A)
Horizon C
- 5. Multiple Choice
Which layer contains a little decomposed organic material (humus) from leaching and medium-sized rocks?
Bedrock
Subsoil (Horizon B)
Topsoil (Horizon A)
Horizon C
- 6. Multiple Choice
Which layer is made up of SOLID ROCK and no humus?
Bedrock
Subsoil (Horizon B)
Topsoil (Horizon A)
- 7. Multiple Choice
What else is in soil besides weathered rock and decomposed organic material?
Water
Air
Living organisms (worms, bugs, etc.)
All of the above
- 8. Multiple Choice
What happens to plants soon after they die?
They become fossils.
They break down and become part of the soil.
They turn into mold.
They turn into coal.
- 9. Multiple Choice
What layer is at the top and is made up of JUST humus?
Topsoil
Organic Layer
Subsoil
Bedrock
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