Longshore Drift and Spit Formation (7-5)

Prevailing wind is the main

__________ of the wind.

• direction

• speed

• force

What are waves moving

up a beach called?

• Swash

• Backwash

• Prevailing wind

• Longshore drift

What are waves moving

down a beach called?

• Swash

• Backwash

• Prevailing wind

• Longshore drift

Swash moves up the beach at the

same angle as the __________.

• current

• tide

• prevailing wind

What angle does backwash

move down the beach?

• 45

• 90

• 180

• 360

Longshore drift involves waves transporting sediment in a __________ pattern along the beach.

• zig-zag

• wavey

• vertical

• horizontal

When waves deposit sediment off the edge of the coast, what is formed?

• A spit

• A headland

• A bay

• A stack

Waves lose energy and deposit sediment because they collide with the flow of a __________.

• River

• Lake

• Stream

• Glacier