| A | B |
|---|
| topsoil | upper layer of soil best to grow plants |
| subsoil | between topsoil and bedrock |
| humus | made up of decayed plants and animals |
| clay | red or yellow holds water well |
| sand | make up of small grains of worn down rock |
| silt | small pieces of broken rock |
| bedrock | beneath subsoil layer of rock |
| erosion | a force that gradually wears away the soil and its nutrients |
| weathering | rocks are broken down by weather, water and living things. |
| soil is made up of | rock, humus, clay, sand, silt |
