Coastal Erosion and Deposition Along the Northwest Coast of America

The video explores the dynamic interaction between land and sea along the northwest coast of America, focusing on erosion and deposition processes. Erosion shapes coastlines by forming cliffs, caves, arches, and stacks, while deposition creates beaches and spits. The video explains how wave energy, local geology, and wind conditions influence these processes, resulting in diverse coastal landscapes.

What is the primary force responsible for shaping the northwest coast of America?

• Deposition

• Tectonic movements

• Erosion

• Volcanic activity

How are wave-cut platforms formed?

• By the collapse of overhanging rock

• By deposition of sand

• By volcanic eruptions

• By tectonic shifts

What is the result of continuous erosion on a cliff?

• The cliff becomes a mountain

• The cliff turns into a valley

• The cliff becomes taller

• The cliff retreats inland

What is a wave-cut notch?

• A hollow formed at the base of a cliff

• A type of fish

• A mountain peak

• A type of plant

What eventually happens to an arch formed by erosion?

• It collapses to form a stack

• It becomes a beach

• It becomes a river

• It turns into a mountain

What determines whether a beach is sandy or pebbly?

• The amount of sunlight

• The color of the water

• The type of fish in the area

• Wave energy and local geology

What happens to the material carried by constructive waves?

• It causes earthquakes

• It is deposited to build up beaches

• It forms new land

• It is eroded away

What is a spit in coastal geography?

• A type of wave

• A type of fish

• A narrow stretch of beach projecting into the sea

• A mountain range

What role does wind play in the formation of spits?

• It creates earthquakes

• It influences longshore drift

• It directs the flow of rivers

• It causes volcanic eruptions

What forms in the sheltered area behind a spit?

• A desert

• A forest

• A mountain range

• Mudflats or salt marshes