tides and currents

Question 1

the rise and fall of water

Answer 1

tide

Question 2

the periodic horizontal movement of the water

Answer 2

tidal current / tidal stream

Question 3

the periodic motion of the waters of the sea due to differences in the attractive forces of various celestial bodies

Answer 3

tidal phenomenon

Question 4

the maximum height reached by tide

Answer 4

high tide / high water

Question 5

the minimum level to which the tide falls

Answer 5

low tide / low water

Question 6

the period at HW or LW during which there is no sensible change of level of tide

Answer 6

stand

Question 7

the difference in height between consecutive high and low waters

Answer 7

range

Question 8

vertical distance from the chart sounding datum to the water surface at any stage of the tide

Answer 8

height of tide

Question 9

the vertical distance from the chart sounding datum to a high water datum

Answer 9

rise of tide

Question 10

there are two high and two low waters each tidal day with relatively small inequality in the high and low water heights

Answer 10

semidiurnal tide

Question 11

tides on the atlantic coast of the US

Answer 11

semidiurnal tide

Question 12

only a single high and single low water occur each tidal day

Answer 12

diurnal tide

Question 13

tides on the gulf of mexico (N. shore), java sea, gulf of tonkin

Answer 13

diurnal tide

Question 14

characterized by a large inequality in the high water heights, low water heights or in both

Answer 14

mixed tide

Question 15

tides on the pacific coast of the US

Answer 15

mixed tide

Question 16

tides with higher high and lower low

Answer 16

spring tides

Question 17

occur at time of new and full moon (sun and moon are in conjunction and at opposition with the earth

Answer 17

spring tides

Question 18

tides with lower high and higher low

Answer 18

neap tides

Question 19

occur at times of first and third quarters (sun and moon are in quadrature with the earth

Answer 19

neap tides

Question 20

high and low waters occur at about the same time each day due to the effect of the sun.

ex. areas of S. pacific and indonesia

Answer 20

solar tide

Question 21

at such places there is often a slight fall or rise in the middle of the high and low water period

the practical effect is to create a longer period of stand at high or low tide

Answer 21

double low water (as at hoek van holland) and double high water (as at southampton, england)

Question 22

occurs when the moon is at the point in its orbit nearest the earth. the lunar semidiurnal range is increased

Answer 22

perigean tide

Question 23

occurs when the moon is farthest from the earth. the semidiurnal range is decreased

Answer 23

apogean tide

Question 24

occurs when the moon is at its maximum semi-monthly declination N or S

diurnal effect is at a maximum

Answer 24

tropic tide

Question 25

occurs when the moon crosses the equator

diurnal effect is minimum

Answer 25

equatorial tide