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Level 75

Soil


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soil
material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use)
absolute location
the exact location of something
parent material
the source of the mineral matter in soil
Horizon
soil layer
nutrients
Pollution from fertilizers and farms made up of nitrates and phosphates
Habitats
places where organisms live
Limiting factors
a biotic or abiotic factor in an organism's environment that restricts numbers, reproduction, or distribution of an organism
humus
the decayed remains of organisms
soil profile
a vertical section through all of the soil horizons
Topsoil
the upper layer of soil that contains minerals and humus (A horizon- mostly minerals from parent material with organic matter- good for plants to live in)
Subsoil
rich in minerals that leached down form A & E horizons and accumulated here (B horizon)
Sandy soil
contains very loose grains and is easy to dig in, doesn't hold water, and has few nutrients, most plants don't grow well in this type of soil
Loam
contains clay, sand, and humus, holds water, contains many nutrients, and plants grow well in it
Non-renewable resource
a resource that will not come back once used
Windbreak
Trees planted at the end or around field to stop wind from blowing away soil
Compost
gathering food scraps and dead plants to decompose to make food for gardens
20Ka
Sea Level at that time
Biotic
Living parts of an ecosystem
Abiotic
Non-living parts of an ecosystem