Coastal Landforms

The video explores how erosion and deposition shape the northwest coast of America. Erosion carves out cliffs, wave cut notches, and platforms, while forming arches and stacks. Deposition builds beaches and spits, influenced by wave energy and local geology. Longshore drift, driven by wind, shapes spits and creates sheltered areas. These processes continuously transform coastlines, creating dynamic landscapes.

What geological process is responsible for the formation of wave cut notches?

• Volcanic activity

• Deposition by constructive waves

• Erosion by destructive waves

• Sedimentation by rivers

How does a stack form along a coastline?

• Through the collapse of an arch

• By deposition of sand and pebbles

• By volcanic eruption

• Through sedimentation in a river delta

What determines whether a beach is sandy or pebbly?

• The presence of coral reefs

• The type of marine life present

• The energy of the waves and local geology

• The amount of sunlight received

What is a spit and how is it formed?

• A coral reef formed by marine organisms

• A deep sea trench formed by tectonic movements

• A rocky outcrop formed by volcanic activity

• A narrow beach formed by deposition and influenced by wind

What is the ongoing impact of erosion and deposition on coastlines?

• They cause the extinction of marine species

• They continuously shape and alter coastal landscapes

• They lead to the formation of mountains

• They create static and unchanging landscapes