Term
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Definition
| breakdown into smaller peices of the smae rock minerals. |
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Term
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Definition
| breakdown of rock into sediment |
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Term
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Definition
| water seeos into cracks during warm weather |
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Term
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Definition
rocks rub against each other and the bump ones get scaratches.
This is caused by wind, water and gravity. |
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Term
| Mechanical weathering examples |
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Definition
by plants send their roots into existing cracks in rocks
by animals burrows causing mechanical weathering.
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Term
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Definition
| repeated temperature changes cause rock to expand and contact and break apart |
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Term
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Definition
| chemical breakdown into a new substance with new properties |
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Term
| Chemical weathering examples |
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Definition
by water water dissolves some minerals and water can also react with some minerals to change them chemically.
by acid rain acid rain is a result of burning fossil fuels
by acidic groundwater acid rain can seep underground
by acids from living things lichens give off acid and make their own soil so they can live on bare rock. |
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Term
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Definition
| iron that reacts with oxygen turns into rust |
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Term
| weahtering occurs faster when |
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Definition
a. the rocks are softer
b. the rocks have more suface area exposed
c. the climate is hotter and more humid
d. temperatures alternate between freezing and thawing. |
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Term
common textures
sandy soil feels
clayy soil feels
lomy soil feels
loam is soil with a good balance of texture and minerals |
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Definition
gritty. water fast
smooth. water slow
velvety. water quickly or slowly |
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Term
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Definition
| water dissolves minerals and carries them to lower layers or carries them away |
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Term
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Definition
| color is darker because it contains more humus |
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Term
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Definition
| contains more focks, clay, pebbles, sand, leched minerals |
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Term
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Definition
methods simply stop eriosion and encorage deposition.
examples wind breaks, coontour plowing, and cover plants, and terracing. |
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Term
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Definition
movement of weathered sediment.
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Term
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Definition
by water water usually moves small sediments
1. surface water or runoff streams, river etc
A river can carry more sediment if it has a steep gradient or a large discharge and large load.
by wind wind usually moves small sediments
wind can carry more and larger peices of sediment if the air moves faster.
by ice and glaciers glacier erode latge and small sediments.
by gravity gavity erodes large and small sediments |
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Term
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Definition
pile up of eroded sediment
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Term
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Definition
| water slows down forming land features such as dela, sand loars, beachesand etc. |
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