physical landscapes

Question 1

what is hydraulic action

Answer 1

waves crash against rocks and compress air into the cracks. This puts pressure on the rock. This happens over and over again until rock breaks off.

Question 2

what is abrasion

Answer 2

Erode particles in the water scape and rub against rock, removing small bits.

Question 3

what is attrition

Answer 3

erode particles in the water smash into each other and break into small fragments. Their edges also get rounded as they rub together

Question 4

what is physical weathering

Answer 4

Physical weathering occurs when physical processes affect the rock, such as changes in temperature or when the rock is exposed to the effects of wind, rain and waves.

Question 5

what is chemical weathering

Answer 5

Chemical weathering involves the interaction of rock with mineral solutions (chemicals) to change the composition of rocks.

Question 6

what is biological weathering

Answer 6

Biological weathering is caused by the movements of plants and animals. For example plants may grow in a crack and as the roots grow the rock will widen.

Question 7

what are constructive waves

Answer 7

Constructive waves are low energy and have stronger swashes than backwashes. This means that any material being carried by the sea is washed up and begins to build up along the coastline.

Question 8

what are destructive waves

Answer 8

hey occur when wave energy is high and the wave has travelled over a long fetch. They tend to erode the coast. They have a stronger backwash than swash.