Coasts

Question 1

Formation of a sea stack

Answer 1

1) large crack opened up by hydraulic action
2) the crack grows into a cave through hydraulic action and abrasion
3) the cave becomes larger
4) the cave breaks through the headland forming a natural arch
5) the arch is eroded and collapses
6) this leaves a tall rock stack
7) the stack is eroded, forming a stump

Question 2

Tides

Answer 2

Tides are caused by the gravitational force of the Earth, the Sun, and the Moon. The biggest factor is the moon.

Question 3

Waves

Answer 3

Waves are created by wind blowing over the surface of the sea.

Question 4

How is the coast used?

Answer 4

Tourism, fishing, renewable energy sites, farming, ports, housing, military defence