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Science Flashcards Soil
definition of soil, pollution and conservation
6
Science
5th Grade
01/06/2014

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Cards

Term
Soil
Definition

Mixture

of bits of rock

and bits of once-living parts

of plants and animals

Term
Soil Horizon
Definition
Each layer of soil
Term
Humus
Definition

The part of soil

that's made up of

decayed organic minerals

Term
Topsoil
Definition

Soil in the horizon

that contains humus

Term
Pollution
Definition

The addition

of harmful minerals

to soil, air, or water

Term
Conservation
Definition

The preservation

or protection

of natural resourses

 including soil

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