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Soil Final
7 May 2014
Question | Answer |
---|---|
Why do plants and soil need each other? | Soil: Plants need to be more fertile and to keep roots in place. Plants: gives minerals and water. |
Soil+Goldilocks. Why? | needs a proper balance of sand, silt, and clay to make fertile soil. |
What is bedrock? | Rocks underneath the horizons. |
At the beginning of the fall, you see leaves on the forest floor. You go back and the leaves are gone? What happened? | Decomposition |
What condition does the freeze-thaw cycle happen? | cold, dry locations |
What condition does wave motion happen? | on a beach/ocean |
What condition does biological weathering occur? | near plants, forests |
What condition does chemical weathering happen? | warm, wet locations |
Define Freeze- Thaw cycle. | In the freeze thaw cycle, water gets into cracks, freezes, melts, and then re-freezes and keeps expanding until the ground cracks. |
Define Wave Motion. | The waves crash down on the sand and make little ripples that chip away at the rocks. |
Define Biological Weathering. | living organisims cause weathering to occur. |
Define Chemical Weathering. | the weathering of rocks caused my chemicals like rain or wind. |
What has the biggest particle size? Medium? Smallest? | Clay: Smallest Sand: Biggest Silt: Medium |
What decides the type of soil we have? | Plants growing there, bedrock, and climate. |
Why is soil valuable? | -farming -root holder |
How can soil be degraded? | 1. overuse 2. over farming 3. deforestation 4. wind erosion |
Which continent has the worst soil? Best? | Worst- Europe Best- North America |
Soil conservation- what are 5 ways we can conserve soil? | 1. crop rotation 2. contour farming 3. wind breaking 4. tillage 5. contour terracing |
How do sand and clay effect water drainage? | Sand- water gets through. Clay- no water gets through. |
What are 2 types of weathering? | PICK 2: Biological, Mechanical, Chemical, Freeze-Thaw, wave motion |