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| needed for erosion; greatest in floods |
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| amount possible to carry: velocity highest during floods |
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| stream sediment; what they carry down stream |
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| stream velocity controls? |
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| gradient, roughness, discharge, and channel shape |
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| ultimate base level of erosion? |
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| stream channels in soil or loose sediment enlarge by? |
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| (1)Headward erosion (2)Downcutting (3)Mass Movement |
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| abrasion by gravel (when pebbles that are carried down the river get caught in a whirl cycle they create a bedrock. |
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| abrasion by gravel (when pebbles that are carried down the river get caught in a whirl cycle they create a bedrock. |
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| lava flows, landslides, sand dunes, cave collapse, glacial deposition |
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| what does urbanization do to rivers |
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| freeze/thaw & rocks pulled into ice |
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| hole left as ice block in drift melted |
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| ice tunnel ridge of stratified drift (a mold) |
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| bullet shaped hill formed as glacier readvances; steep sides faces ice |
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| glacial boulder doesn't match bedrock it sits on (carried by glaciers) |
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| continent brought near a pole |
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| earth orbit variations affect surface temperatures |
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Definition
| (1)eccentric orbit (2)tilted axis (3)rotation axis wabble |
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| variations in greenhouse gasses |
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| possible factors involved in an Ice Age |
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| snow/ice reflects sun's energy & lowers temperatures |
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Definition
| possible factors involved in an Ice Age |
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| weak ocean current circulation to poles lowers temperatures |
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| slows down=cooler temperatures; speeds up= warmer temperatures |
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| what is the importance of groundwater? |
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| largest freshwater reservoir |
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| ease of water transmission |
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| when warm water comes out of a spring |
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| intermittently spouts out water |
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| high in calcium/magnesium carbonate (poor suds) |
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| low in ions or high in sodium (good suds) |
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