1855441
Description
Flashcards by irenepapers, updated more than 1 year ago
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Created by irenepapers
almost 10 years ago
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| Question | Answer |
| Erosion | movement of weathered material from one place to another |
| Deposition | process that puts weathered material in a new location |
| What are the 4 agents of erosion? | 1) Gravity 2) Wind 3) Water 4) Glaciers |
| Gravity | force that pulls objects towards the center of the earth |
| Mass Movement | movement of weathered material by gravity |
| What are the types of Mass Movement? | Creep Rock slide Mud flow Slump |
| Rock Slide | movement of rocks down a hill |
| Creep | slow movement of sediments down a hill |
| Slump | sudden movement downhill or large chunks of earth |
| Mudflow | movement of wet sediments that flow downhill over the ground |
| Glacier | large mass of ice |
| What are the effects of Glaciers? | U-shaped valleys and cirques (bowl shaped) |
| What are the Glacial Deposits? | Out wash and Till |
| Out Wash | deposits of sand and gravel left by a glacial stream |
| Till | sediments from glacier ice |
| How is Wind an agent of erosion? | Wind picks up and carry sediments as it moves |
| What does wind use to erode the earth? | Abrasion and Deflation |
| Abrasion | when rock particles rub against one another & other rocks due to streams, wind, waves, gravity, and glaciers. |
| Deflation | occurs when wind blows across loose sediments and carries them away, often leaving behind particles too heavy to move |
| Loess | wind deposits silt |
| Sand Dunes | wind deposits sand |
| How do Sand Dunes travel? | The grains are blown up to the windward side of the dune until they reach the top. Then, they drop down into the shelter of the lee (the side away from the wind) |
| How is Water an agent of erosion? | Water picks up weathered material and carries it |
| Runoff | water that flows over the earth’s surface |
| Sheet Flow | water that flows without channels or path over the Earth |
| Rills | small channels cut in sediments by moving water |
| Gullies | formed when rills deepen |
| Streams | made when gullies connect |
| Deltas | formed where streams meet oceans or lakes |
| How does the shape of the valley eroded by a glacier differ from the shape of a valley eroded from running water? | The shape of a valley eroded by a glacier is usually in a U-shape or a cirque form while the shape of a valley eroded from running water makes V- shaped valleys |
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