Tides Flashcards
1
Q
what causes tides
A
gravity
2
Q
when do they occur
A
when the gravitational pull of the sun and moon changes the water levels in the sea
3
Q
where are the tidal ranges largest
A
in channels and river estuaries
4
Q
what happens when the sun and moon are in alignment
A
the highest highs and lowest lows occur
5
Q
why are the spring tides special
A
they have the largest possibility for hidden tidal ranges
6
Q
what’s a rip current
A
a strong undercurrent (backwash) which flows out to sea more quickly and is caused due to a gap in the sand bar
7
Q
what’s a rip tide
A
they occur when water is forced through a narrow passage like a lagoon
