| Break it on Down | Layers, Soil, Etc. | Miscellaneous Topics |
|---|---|---|
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What is recycling?
Reusing old material.
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What is topsoil?
The top 2 to 6 inches of soil?
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What are elements?
Substances composed of only one type of atom.
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What is decompose?
To break down.
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What are pedology?
The study of soil.
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What is a compound?
Substances composed of two or more elements bonded together.
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What is weathering?
The process that breaks rock down into soil.
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What is bedrock?
The layer of solid rock that lies below the subsoil.
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What is a hypothesis?
Thinking seriously about the objects and events of nature and formulating a sensible explanation.
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What is organic material?
Material primarily derived from living organisms?
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What is subsoil?
The soil layer where weathered particles settle after being washed down through the topsoil.
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What is nitrogen?
Which mineral nutrient gives plant a rich, green color?
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What are mineral materials?
Materials primarily derived from nonliving matter, such as minerals and rocks.
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What is the nitrogen cycle?
The process where nitrogen is moved from the air to the soil to be used by plants and returned to the atmosphere to be used again.
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What is an experimental group?
A group on which a test is performed.
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