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| Question | Answer |
|---|---|
| Bedrock is the solid layer of rock beneath | the soil |
| Humus is a dark colored substance that forms | when plants and animals decay |
| Geologist look a 3 things to identify the type of soil | A. Soil Fertility: How well the soil supports plant growth B. Soil Texture: The feel and size of the particles in the soil C, Soil pH: How much acid is in the soil |
| 5. Layers of Soil | A. O Horizon: Made of organic material of plant and animal remains B. A Horizon: Made of topsoil C. B Horizon: Made of subsoil D. C Horizon: Made of bedrock that is beginning to weather and break apart E. 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 |