lesson 3 - currents and tides Flashcards

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1
Q

what are tides the result of?

A

the gravitational pull of the moon and the sun

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2
Q

what is a spring tide?

A

the moon and sun are aligned brings the highest high tide and lowest low tide - highest tidal range

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3
Q

what is a neap tide?

A

the moon and sun are 90 degrees to one another lowest high tide and highest low tide smallest tidal range

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4
Q

what is the tidal range?

A

the difference between the high and low tide

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5
Q

what influence does the tidal range have?

A

a wide zone of wave attack resulting in the formation of wave cut platforms

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6
Q

what are longshore currents?

A

occur as most waves don’t hit the coast head on but at an angle - they transport material along the coast

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7
Q

what are rip currents?

A

strong currents moving away from the coast develop when seawater is piled up along the coastline by incoming waves

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8
Q

what is upwelling?

A

the movement of cold water from the deep ocean towards the surface

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