Flashcards
River processes, long profiles and cross profiles
Flashcards do conjunto (18)
- 1What is abrasion?Pieces of material are carried in the water and wear away the bank like sandpaper
- 2What is attrition?Material carried along the river collides into other pieces of material and breaks into smaller pieces
- 3What is hydraulic action?The force of water hitting the river bank/ bed which then breaks pieces off
- 4What is solution erosion?Some rocks (like limestone) are dissolved by acids in the water, which then go on to corrode the river bank/ bed
- 5Name 4 types of erosion.Abrasion, attrition, hydraulic action and solution erosion
- 6Name 4 types of transportation.Traction, saltation, solution and suspension
- 7Define erosion.The removal of material
- 8Define transportation.The movement of the load along the river channel
- 9Define traction.Large boulders and rocks are rolled along the river bed by the rising power
- 10Define saltation.Sand sized particles are bounced along the river bed
- 11Define suspension.Small particles are carried along by the river
- 12Define solution (transportation).Material is dissolved into the river and then transported
- 13Define deposition.Material is dumped at a point along the river after being carried from further upstream
- 14What is the difference between lateral and vertical erosion?Lateral erosion- wearing away the river banks, widening the channel
Vertical erosion- wearing away the river bed, making the channel deeper - 15Describe the cross profile and river channel in the upper course of a river.Cross profile- steep 'v' shaped valley. Tall narrow cross profile.
River channel- Narrow channel, shallow water - 16Describe the cross profile and river channel in the middle course of the river.Cross profile- profile widens, less deep and the valley sides are less steep.
River channel- becomes wider and deeper - 17Describe the cross profile and river channel in the lower course of a river.Cross profile- the valley is very broad. The sides are a long way from the river. The valley is gently sloping and low lying
River channel- deepest and widest part of the river - 18How does the gradient of a river change as you move from the source to the mouth?The gradient becomes much less steep
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- GCSE GCSEs (Geography) FlashCards sobre River processes, long profiles and cross profiles, criado por a a em 28-04-2014.
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