Watch the clip and take notes on longshore drift and the formation of the features shown

Watch the clip and take notes on longshore drift and the formation of the features shown.

• Watch the clip and take notes on longshore drift and the formation of the features shown.

• BBC - Learning Zone Class Clips - Depositional coastlines - Geography Video

A beach profile

• A beach profile

Bayhead beach – typically small, crescent shaped and form when sediment (usually sand and/or shingle) accumulates in a bay or cove between two protective headlands. Such protection means little change in input or output of sediment, so the shape remains. Lulworth Cove beach is an example.

• Bayhead beach – typically small, crescent shaped and form when sediment (usually sand and/or shingle) accumulates in a bay or cove between two protective headlands. Such protection means little change in input or output of sediment, so the shape remains. Lulworth Cove beach is an example.

Lateral beaches are usually longer, develop along straight coastlines and are aligned to the prevailing winds. There has to be a regular input of sediment to sustain these beaches due to longshore drift and erosion during stormy conditions.

• Lateral beaches are usually longer, develop along straight coastlines and are aligned to the prevailing winds. There has to be a regular input of sediment to sustain these beaches due to longshore drift and erosion during stormy conditions.

Sand dunes are small ridges or hills of sand found at the top of a beach, above the usual maximum reach of the waves. They form from wind blown sand that is initially deposited against an obstruction such as a bush, driftwood or rock.

• Sand dunes are small ridges or hills of sand found at the top of a beach, above the usual maximum reach of the waves. They form from wind blown sand that is initially deposited against an obstruction such as a bush, driftwood or rock.

As more sand particles are deposited the dunes grow in size, forming rows at right angles to the prevailing wind direction. If vegetation, such as Marram Grass and Sand Couch, begins to grow on the dune its roots will help to bind the sand together and stabilise the dunes.

• As more sand particles are deposited the dunes grow in size, forming rows at right angles to the prevailing wind direction. If vegetation, such as Marram Grass and Sand Couch, begins to grow on the dune its roots will help to bind the sand together and stabilise the dunes.

• BBC - Learning Zone Class Clips - Sand dune formation and movement - the Dune of Pilat - Geography Video

Salt marshes occur in sheltered water areas, such as estuaries or behind spits. An estuary is a wide and shallow area of water where a river meets the sea; it contains a mixture of fresh and salt water called brackish, a result of the twice daily flooding by the tide.

• Salt marshes occur in sheltered water areas, such as estuaries or behind spits. An estuary is a wide and shallow area of water where a river meets the sea; it contains a mixture of fresh and salt water called brackish, a result of the twice daily flooding by the tide.

• BBC - Learning Zone Class Clips - Sands of Forvie - marshes and mudflats - Geography Video

Q1) define the following terms:

• Q1) define the following terms:

• Swash

• Backwash

• Hydraulic action

• Attrition

• Abrasion

• Longshore drift

Q3) explain how a spit, bar and tobolo are formed.

• Q3) explain how a spit, bar and tobolo are formed.

Q5) explain how a cave, arch, stack and stump are formed.

• Q5) explain how a cave, arch, stack and stump are formed.

Q5) explain how a blowhole is formed.

• Q5) explain how a blowhole is formed.

Q7) explain how a Saltmarshes are formed.

• Q7) explain how a Saltmarshes are formed.