| A | B |
|---|
| erosion | Weathered pieces of rock carried from one location to another by wind, water and gravity. |
| weather | Can be described using words like sunny, rainy, cloudy, snowy, windy, warm, hot, cool and cold. |
| precipitation | The water that falls to Earth as rain, snow, and ice. |
| subsoil | The layer of soil located beneath the topsoil. |
| topsoil | The upper surface of soil. |
| weathering | The porcess of rocks being broken down by weather, water, and organisms over many years to create soil. |
| evaporation | The process of water changing to water vapor. |
| condensation | The process of water changing from a gas to a liquid. |
| thermometer | The instrument that measures air temperature. |
| soil | This is made up of silt, clay, sand, humus and pieces of rock. |
| nutrients | These are necessary for plants to live and grow in soil. |
| humus | Decayed matter that adds nutrients to the topsoil layer. |
| clay | This contains timy particles that hold water well and are rich in nutrients. |
| sand | These small grains of rock have few nutients and do not hold water well. |
| silt | These particles are larger than clay, smaller that sand, and are made up of small pieces of broken rock. |
| rock | A component of soil that can be broken down to become first sand, then silt, and finally clay. |
| bedrock | This is the solid layer of rock that is located below the subsoil and topsoil. |
