| Question | Answer |
| humus | the part of the soil formed by decaying organic material-makes soil black in color |
| organic matter | things that are alive or once were alive |
| horizon | soil layer |
| soil profile | a cross section of the soil horizons |
| top soil | uppermost layer of soil also known as the A horizon |
| subsoil | the middle soil layer also known as the B horizon |
| substratum | the bottom soil layer also known C horizon |
| bedrock | the layer of rock beneath the soil layer |
| leaching | the process in which water washes minerals from the topsoil to the subsoil |
| erosion | the process by which the products of weathering are moved from one place to another |
| residual soil | soil that remains on top of the rock from which it was formed |
| transported soil | soil that is moved away from the place where it was created |
| the part of the soil formed by decaying organic material-makes soil black in color | humas |
| things that are alive or once were alive | organic matter |
| soil layer | horizon |
| a cross section of the soil horizons | soil profile |
| uppermost layer of soil also known as the A horizon | top soil |
| the middle soil layer also known as the B horizon | subsoil |
| the bottom soil layer also known C horizon | substratum |
| the layer of rock beneath the soil layer | bedrock |
| the process in which water washes minerals from the topsoil to the subsoil | leaching |
| the process by which the products of weathering are moved from one place to another | erosion |
| soil that remains on top of the rock from which it was formed | residual soil |
| soil that is moved away from the place where it was created | transported soil |
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