Tides

Question 1

are daily changes in the elevation of the ocean surface

Answer 1

tides

Question 2

occurs when the sun and the moon are aligned causing larger tidal bulges(higher high tides) and deeper tidal troughs (lower low tides) thus, producing a large tidal range.

Answer 2

spring tide

Question 3

occurs when the gravitational pull of the sun and the moon acts upon earth at right angles at a right angle therefore they are partially offsets the gravitational forces of each other producing producing less tidal range

Answer 3

Neap Tide

Question 4

Horizontal flow of water accompanying the rise and fall of the tide

Answer 4

tidal currents

Question 5

tidal currents that advance into the coastal zone as the tide rises

Answer 5

Flood current

Question 6

tidal current genertaed by seaward moving water as the falls

Answer 6

ebb current

Question 7

periods of little to no current

Answer 7

slack water

Question 8

area affecyed by alternating tidal currents

Answer 8

tidal flats

Question 9

deltas created by tidal currents

Answer 9

tidal deltas

Question 10

formed at the landward inlet

Answer 10

flood delta

Question 11

formed at the seaward side of delta

Answer 11

ebb delta

Question 12

wave ction can maintain a barrier system that can be more or less continous for tens of kilometers

Answer 12

microtidal coast

Question 13

with the increased tidal range in mesotidal conditions, more exchange of water between the lagoon and the sea is required, resulting in more inlets forming, breaking up the barrier into a series of islands

Answer 13

mesotidal coast

Question 14

coast that have a high tidal ranges do not develop barrier systems because the ebb and flood tidal currents are stronger controls on the distribution of sediment than wave action

Answer 14

Macrotidal Coast

Question 15

water that is closest to the moon experiences the largest gravitational attraction and this creates a bulge of water

Answer 15

tidal bulge

Question 16

any point on the surface the level of the water will rise and fall twice a day as the two bulges are passed in each rotation

Answer 16

diurnal tides

Question 17

a point on the earth willpass under one high bulge and a slightly lower bulge 12 hrs or so later

Answer 17

Diurnal tide inequality

Question 18

sun and moon are in line with the earth

Answer 18

syzygy

Question 19

during the four weeks of the moon’s orbit, it is twice in line and twice perpendicular

Answer 19

near spring tidal cycles (spring and neap tides)

Question 20

occuring when the three bodies are in line.

The highest tidal range, occurs near the times of the new and full moons.

Answer 20

spring tide

Question 21

the lowest tidal range occuring near three times of the first and third quarters of the moon

Answer 21

neap tides

Question 22

cycle cased by the elliptical nature of the earths orbit around the sun. At the sprimg (vernal) and autumn (fall) equinoxes, the earth is closest to the Sun and the gravitational effect is strongest.

Answer 22

Annual Tidal Cycle

Question 23

high tides and low tides

Answer 23

tidal Ranges

Question 24

point of zero amplitude of one harmonic constituent of the tide.

Answer 24

Amphidromic cells

Question 25

tidal ranges of up to mean 2m tidal range

Answer 25

microtidal range

Question 26

between 2-4 m range of tide

Answer 26

mesotidal range

Question 27

over 4m tidal range

Answer 27

Macrotidal range

Question 28

horozontal movement of water induced by tides

Answer 28

tidal current

Question 29

tidal current that moves onshore between the low and high tide

Answer 29

flood current

Question 30

the opposite direction, water levels return to the low tide

Answer 30

ebb tide

Question 31

rotational pattern of the tidal wave within amphidromic cells results in a flow of water that follows a circular or ellipticsl pattern

Answer 31

rotary tides