Longshore Drift and Coastal Processes

The video provides a five-minute geography lesson on longshore drift, explaining how material is moved along the coast by the action of waves influenced by prevailing winds. It covers the concepts of swash and backwash, the role of gravity, and the zig-zag pattern of sediment transport. The video also discusses the impact of longshore drift on coastlines, such as beach erosion, and introduces methods like groins to prevent sediment loss. The lesson concludes with a homework task for further revision.

What is the primary process that moves material along the coast in a zig-zag pattern?

• Tidal waves

• Longshore drift

• Erosion

• Sedimentation

Which factor primarily influences the direction of the swash?

• Sunlight

• Gravity

• Prevailing wind

• Tides

What is the term for the motion of waves moving up the beach?

• Backwash

• Swash

• Ebb

• Flow

What causes the backwash to move at a right angle to the coast?

• Wind direction

• Gravity

• Tidal forces

• Wave height

How does the backwash differ from the swash in terms of direction?

• It follows the wind direction

• It moves in the opposite direction of the swash

• It moves at a right angle to the coast

• It moves parallel to the coast

What is the effect of longshore drift on beaches?

• It increases beach width

• It causes erosion and deposition

• It stabilizes the beach

• It has no effect

What are groins used for in coastal management?

• To attract tourists

• To increase wave height

• To measure tidal changes

• To prevent longshore drift

In which direction does longshore drift generally move on the west coast of the UK?

• South

• North

• East

• West

What anomaly exists in the longshore drift pattern along the south coast of the UK?

• It does not occur

• It moves north instead of south

• It moves east instead of west

• It moves west instead of east

Why might some areas be at risk of losing their beaches due to longshore drift?

• Decreased wave activity

• Rising sea levels

• Material is moved away from the area

• Increased tourism