Y10 Rivers & Coasts Assessment Feb 2021

The three courses of a river include.... to make up its profile!

• Top’ Middle & bottom

• Upper, Middle & Lower

• Source, Mouth & intersection

V- shaped valleys are found where

• Upper course

• Mouth of river

• At an ox-bow lake

River speed increases with...

• An increase in friction

• A decrease in friction

• An increase in sediment

River depth increases with..

• Decrease in friction

• Increase in vertical erosion

• Increase in lateral erosion

Water flows it’s quickest through a meander at which point...

• Inside of a bend just like a race car

• At the Thalweg..

• Through a riffle

Transportation means...

• Sediment is being carried

• Sediment is left in a new position

• Sediment is building up at the mouth of a river

An interlocking spurs occur...

• Mouth of river

• In a v shaped valley

• In a meander

Waterfalls form when...

• Hard rock is undercut because it lies on top of softer rock

• Soft rock erodes at the same pace as hard rock causing a vertical drop

• When hard rock forces water back up a steep gradient forming a gorge

Deposition is when...

• Sediment is being carried along with the river

• Sediment is no longer being carried by the river

• Sediment is being picked up by the river

Ox bow lakes are formed when

• Meanders move away from each other

• Meanders move towards each other

• Meanders push water back up a steep gradient