Coastal Erosion and Deposition

What is erosion?

• Breaking down of rocks by waves

• Building up of beaches

• Transporting material across the sea

• Planting trees on the coastline

What is deposition?

• Breaking rocks into smaller pieces

• Waves dropping material when they lose energy

• Dissolving cliffs in saltwater

• Removing sand from a beach

What type of erosion involves water forcing into cracks in rocks?

• Abrasion

• Hydraulic Action

• Attrition

• Corrosion

What is abrasion also known as?

• Sandpaper effect

• Pressure erosion

• Dissolving effect

• Smoothing effect

Which type of erosion dissolves rocks with saltwater?

• Attrition

• Corrosion

• Hydraulic Action

• Abrasion

What does attrition do to rocks?

• Dissolves them

• Breaks them into smaller, smoother pieces

• Forces water into cracks

• Wears cliffs down like sandpaper

Which process does NOT directly erode cliffs?

• Hydraulic Action

• Attrition

• Abrasion

• Corrosion

What happens to waves as the fetch increases?

• They get smaller

• They carry more energy

• They lose energy

• They move slower

What is fetch?

• The distance wind blows over the sea

• The speed of waves

• The time waves take to reach the shore

• The height of waves

What is hydraulic action most likely to cause?

• Smoothing of rocks

• Undercutting of cliffs

• Dissolving cliffs

• Building beaches