How do waves form?
Waves form by the wind blowing over the sea
Waves form due to the pull and stretch of the tides
Waves are formed due to the four processes of coastal erosion
Waves can be formed due to the gravitational pull of the earth on the water that changes over time as the earth spins
What is the fetch?
The length of a wave
The distance that the wind blows over
A characteristic of destructive waves
The distance of water that is pulled up the beach
A tsunami is caused by an underwater earthquake or volcanic eruption that shakes the seabed
What is the swash?
The foam on the surface of the wave
The water that flows back towards the beach
The water that rushes up the beach
What are the features of a constructive wave?
Low wave
Powerful backwash
Powerful swash
Wave crests close together
Carry and deposit large amounts of sand and pebbles
Formed by storms that are hundreds of kilometres away
What are the features of a destructive wave?
Waves spaced closely together
Gently sloping wave front
Strong backwash
Forms a steep beach
Can destroy the beach by removing sediment
What causes cliffs to collapse?
Weathering
Overpopulation
Mass movement
The weather
A change in climate
Mechanical (❌) weathering is the ❌ (break-up) of rocks. Where this happens, piles of rock fragments called ❌ can be found at the foot of cliffs.
Chemical weathering- caused by ❌ changes. ❌, which as slightly ❌, gradually dissolves certain types of rocks and ❌.
weathering- due to the actions of flora and . Plant roots grow in cracks in the rocks, and animals such as burrow into weak rocks like sands.
