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|
|
3
|
solid rock below soil
|
|
4
|
soil with grains of rock that are too small to be seen with your eyes alone
|
|
5
|
the measure of how difficult it is for a mineral to be scratched
|
|
8
|
the movement of weathered rocks and soil
|
|
9
|
a solid object found in nature that has never been alive
|
|
11
|
the top layer of soil - animals such as ants and earthworms live here
|
|
12
|
soil with very, very tiny grains of rock
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|
|
|
|
|
|
1
|
a naturally formed solid made of grains of one or more minerals
|
|
2
|
breaking down of rocks into smaller pieces
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|
4
|
soil with grains of rock that you can see with your eyes alone
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|
6
|
the layer underneath topsoil - not much humus, but it does have small rocks
|
|
7
|
part of soil made of broken-down pieces of dead plants and animals
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|
10
|
soil that is a mixture of humus, sand, silt, and clay
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|
|
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