Erosion

Question 1

Attrition

Answer 1

Waves smash rocks and pebbles on the shore into each other, and they break and become smoother

Question 2

Abrasion

Answer 2

Bits of rock and sand in waves grind down cliff surfaces like sandpaper.

Question 3

Hydraulic Action

Answer 3

Air may become trapped in joints and cracks on a cliff face. When a wave breaks, the trapped air is compressed which weakens the cliff and causes erosion

Question 4

Solution

Answer 4

Acids contained in sea water will dissolve some types of rock such as chalk or limestone.