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Earth's Changes
| Question | Answer |
|---|---|
| How would the permeability of soil be determined/calculated | Divide the volume of water by the time passed |
| how does stream discharge affect the speed of erosion along a river | Greater discharge = greater erosion |
| What are two ways stream discharge can increase | -Increase speed of the waterflow -Increase volume of water |
| Increase permeability | -Gentle rain -Gentle slopes -Sand -Dense vegetation -Forests |
| Decrease permeability | -Rapid rain events -Steep slopes -Clay -Agriculture -Urbanization -Low vegetation |
| Describe the relationship between weathering, erosion, and deposition | Weathering is the breaking down of rocks/minerals into sedimentary Erosion is when these sediments are moved to a new location until eventually they get.. Deposited, or dropped, at a new location |
| How does a delta form | Rivers carry sediments downstream. Eventually when the river or stream runs into a standing body of water, it loses energy, causing the sediments to drop Eventually when enough of these sediments pile up, it creates a fan-shaped landform called a delta |
| Explain what a hydrograph is and how a flood might be shown on a hydrograph | A hydrograph is a sensor that monitors river discharge. |
| What factors may cause a hydrograph to "spike," or dramatically increase | If the river were to flood, discharge would increase, leading to a spike in the hydrograph |
| What is "ice wedging?" | A physical weathering process in which water freezes in the cracks of a rock, causing the frozen ice to expand. When it expands, it enlarges the crack, eventually causing the rock to break |
| How does sediment size affect soil permeability | The larger the sediments, the higher the permeability |
| Identify advantages and disadvantages of farming in a floodpain. Describe the constructive and destructive processes that would occur | Advantage - Sediments deposited by flooding will continue to fill the area with good soil for farming Disadvantage - Area is prone to flooding which will cause damage to crops, or deposit heavy amounts of sediment |
| What is the difference between mechanical/physical weathering and chemical weathering | Mechanical - Physical breakdown of rocks/minerals Chemical - Breakdown of rocks; dissolving |
| Identify areas/landforms that may be exposed to weathering/erosion | Erosion - Arches, hoodoo, decrease in hill size, valleys Deposition - Increase in hillsize, delta |
| Identify several depositional environments | -Entering a standing body of water (lake/ocean) forming a delta -At the bottom of a hill, valley, or low elevation |
| What two factors control flooding in an area | -High volume of water -In a very short period of time (too much to permeate) |
| What is soil composed of | Rocks, minerals, organic material |
| Define sedimentary rock | Rock formed by sediment and rock fragments compressed and cemented together. Typical form in bodies of water (when layers of sediment pile a top one another) |
Created by:
97liner
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