Coasts: Key Words

Question 1

Marine Transportation

Answer 1

Movement of rocks and other sediment by the sea

Question 2

Marine deposition

Answer 2

Laying down of rocks and other sediment by the sea

Question 3

Solution

Answer 3

Salts dissolved from the rocks by the seawater are carried in solution

Question 4

Suspension

Answer 4

Small particles can be carried in suspension by the waves

Question 5

Saltation

Answer 5

Pebbles will be bounced along the seafloor

Question 6

Traction

Answer 6

Large rocks will be rolled along the seafloor

Question 7

Marine erosion

Answer 7

The wearing away of land surfaces and removal of materials by river and sea water, ice and wind

Question 8

Constructive waves

Answer 8

They are created in calm weather, are not very powerful, break on the shore and deposit material building up on beaches. Their swash is stronger than backwash

Question 9

Destructive waves

Answer 9

They are created in storm conditions, when wind is powerful and has been blowing for a while. They have high wave energy, are very strong and the waves have travelled over a long fetch, eroding coasts. Their backwash is stronger than swash

Question 10

Abrasion

Answer 10

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

Question 11

Attrition

Answer 11

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

Question 12

Hydraulic action

Answer 12

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

Question 13

Solution

Answer 13

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