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Changing Earth's Surface
Humus
Humus definition: Decayed plant and animal matter in soil.
Related Terms
Core
Crust
Deposition
Earthquake
Epicenter
Erosion
Fault
Glacier
Landform
Landslide
Lava
Magma
Mantle
Moraine
Soil Horizon
Soil Profile
Topsoil
Volcano
Weathering
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