click below
click below
Normal Size Small Size show me how
soil
| Question | Answer |
|---|---|
| Soil is loose weathered material on earth's surface in which plants can grow. It is a mixture of rock particles, minerals, decayed organic matter, water, and air. | Bedrock is the solid layer of rock beneath the soil. 3. Humus is a dark colored substance that forms when plants and animals decay. |
| Geologist look a 3 things to identify the type of soil | soil Fertility, Soil Texture, Soil pH |
| Soil Fertility | How well the soil supports plant growth |
| Soil Texture: | The feel and size of the particles in the soil |
| Soil pH | How much acid is in the soil |
| O Horizon | Made of organic material of plant and animal remains |
| A Horizon | Made of topsoil |
| B Horizon | Made of subsoil |
| C horizon | Made of bedrock that is beginning to weather and break apart |
| Bedrock | Solid layer of rock |
| How is humus formed | A. Decomposers: breaks up remains of dead plants and animals. B. Burrowers: Mix up the soil |