Coasts

Question 1

Define what a wave is

Answer 1

A wave is a body of water moving towards a coastline at a higher than average level

Question 2

What is backwash?

Answer 2

Wave that is always at a right angle to the sea

Question 3

What is swash?

Answer 3

Wave that goes up the beach at the angle of the prevailing wind

Question 4

What is the fetch?

Answer 4

The distance the wind travels

Question 5

What is a constructive wave?

Answer 5

Created in calm weather condition
Stronger swash than backwash
Long wavelength and low height

Question 6

What is a destructive wave?

Answer 6

Created in stormy weather
Stronger backwash than swash
High wavelength and high in height

Question 7

What is mechanical weathering?

Answer 7

The breakdown of rock without changing its chemical composition - freeze thaw

Question 8

What is chemical weathering?

Answer 8

The brealdown of rocks by changing its chemical composition - Carbonation weathering

Question 9

Name the 5 steps of how freeze thaw happens

Answer 9

1) Temperature altenernates above and below 0
2) Water gets into cracks in rock
3) Water freezes and expands, putting pressure on rock
4) Water thaws and contracts, releasing pressure
5) Repetition of this = cracks are widen and rocks break

Question 10

What is weathering?

Answer 10

Breakdown of rocks where they are - not where they are carried away, that is erosion