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Flashcards in Key words Deck (23):
1

What is the meaning of an ocean current?

The flow of a large body of water in an ocean.

2

What is the meaning of the prevailing wind?

The most frequently occurring wind direction in an area.

3

What is the meaning of swash?

The forward movement of a wave as it moves up the beach.

4

What is the meaning of backwash?

The backward movement of a wave as it moves down the beach.

5

What is the meaning of a destructive wave?

Long wavelength waves that deposit material on the beach.

6

What is the meaning of a constructive wave?

Short wavelength waves that erode the beach.

7

What is the meaning of tide?

The alternative rise and fall of the level of the sea.

8

What is the meaning of a storm surge?

High onshore winds and tides combine to give unusually high sea levels.

9

What is the meaning of a landform?

A feature on the earth’s surface.

10

What is the meaning of erosion?

The wearing away of bedrock or sediment by mechanical and chemical actions of all moving agents such as rivers, wind and glaciers at the surface or in caves.

11

What is the meaning of weathering?

A process by which exposed rock is disintegrated and decomposed by atmospheric agents or water

12

What is the meaning of marine processes?

Marine processes are those associated with the action of waves and the ocean.

13

What is the meaning of hydraulic pressure?

The process by which breaking waves compress pockets of air in cracks in a cliff. The pressure may cause the crack to widen, breaking off rock.

14

What is the meaning of abrasion/corrasion?

Wearing away of cliffs by sediment flung by breaking waves.

15

What is the meaning of attrition?

Erosion caused when rocks and boulders transported by waves bump into each other and break up into smaller pieces.

16

What is the meaning of a solution?

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

17

What is the meaning of wetting drying?

Causes expansion and contraction of rocks which weakens the rock and leaves is susceptible to further erosion.

18

What is the meaning of sub-aerial processes?

Processes active on the face and top of cliffs.

19

What is the meaning of percolation?

The rate at which water soaks into rocks. A shingle beach has a higher percolation rate than a sand beach.

20

What is the meaning of a concordant coastline?

Concordant coasts have alternating layers of hard and soft rock that run parallel to the coast.

21

What is the meaning of a discordant coastline?

On a discordant coastline, alternating layers of hard and soft rock are perpendicular to the coast.

22

What is the meaning of lithology?

The properties of rocks – mineral composition, cracks, joints.

23

What is the meaning of promontory ?

A high ridge of land or rock jutting out into a body of water; a headland.