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19 Cards in this Set
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- Back
- 3rd side (hint)
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Process by which rocks are broken down by the forces of nature is? |
Weathering |
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The breakdown of large rocks into fragments by physical forces |
Physical weathering |
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Occurs when rainwater or melted ice soaks into tiny cracks in a rock and freeze |
Ice wedging |
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The roots of trees have split large boulders and even tiny plants can split rocks as their roots grow into tiny cracks which involves the breaking or peeling away of rocks in layers |
Exfoliation |
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When minerals and rocks react chemically with air or water the minerals may weekend or even dissolve away causing the rocks to crumble this process is known as? |
Chemical weathering |
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The main agent of chemical weathering is |
Water |
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The oxygen in air and water reacts with minerals like calcium magnesium and iron to form new compounds |
Oxidation |
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What rocks have undergone weathering physical processes like wind or running water may carry away the rock fragments by |
Erosion |
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During a heavy rain more rain water may fall then can seep into the ground or evaporate the axis water called |
Runoff |
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Stripping away a thin sheet of topsoil from the surface of the land in a process called |
Sheet erosion |
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Narrow shallow cuts in the soil |
Rills |
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Large streams that carry water from the mountains to the sea |
Rivers |
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In mountainous northerly areas these brooks and streams usually form |
Headwaters |
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The material carried by a stream is |
Load |
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Consist of a relatively large stream in any smaller streams that flow into it |
Drainage system |
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Two adjoining drainage basins are separated by a raise the land area called |
Drainage divide |
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The western drainage divide of the basin is |
Great divide |
Of the Rocky Mountains |
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Numerous streams continue to feed into the river at various points along its course increasing the amount of water that it carries |
Tributaries |
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The level or nearly level land that borders a river and is covered by river water and flood time is |
Floodplain |
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