Geography- Marine Terminology Flashcards Preview

Grade 9 November Exams > Geography- Marine Terminology > Flashcards

Flashcards in Geography- Marine Terminology Deck (18):
1

Wave fetch

Distance that air blows over the ocean

2

Wave crest

Highest point of a wave

3

Wave trough

Lowest point of a wave

4

Wave height

Distance between trough and crest

5

Wave length

Distance between one crest or trough and the next

6

Swash

Movement of water up a beach

7

Backwash

Movement of water down a beach

8

High tide

State of the tide when at its highest

9

Low tide

State if the tide when at its lowest

10

Backshore

Not affected by wave action

11

Foreshore

Only affected during high tide

12

Near shore

Exposed only during low tide

13

Coastal erosion

The wearing away and breaking up of rock along the coast.

14

Hydraulic action

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

15

Abrasion

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

16

Attrition

Waves crash rocks and pebbles on the shore into each other, and they break and become smoother.

17

Solution

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

18

Sand bar

A long pile of sand in the ocean, formed by the movement of water.

Decks in Grade 9 November Exams Class (186):