Humus is made up of what materials?
Soil

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Science
•
6th Grade
•
Hard
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20 questions
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1.
FLASHCARD QUESTION
Front
Back
decomposing plants and animals
2.
FLASHCARD QUESTION
Front
What is soil made of?
Back
Weathered rocks and minerals, dead plants and animals, air and water.
3.
FLASHCARD QUESTION
Front
Which layer of soil is on the bottom of a soil profile?
Back
bedrock
4.
FLASHCARD QUESTION
Front
Which of the following is NOT one of the three layers of soil? topsoil, undersoil, subsoil, bedrock
Back
undersoil
5.
FLASHCARD QUESTION
Front
What is the layer of soil just below the topsoil?
Back
subsoil
6.
FLASHCARD QUESTION
Front
Which of the horizon layers forms LAST?
Options: Weathered or decomposed rock (Horizon C), Subsoil (Horizon B), Topsoil (Horizon A)
Back
Subsoil (Horizon B)
7.
FLASHCARD QUESTION
Front
Why is topsoil darker than all other levels of soil?
Back
It contains more organic matter.
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