GEOLOGY

EARTH SCIENCE

OCEANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Many areas the ocean have ____ high tides and ____ low tides.
A
one
B
three
C
no
D
two
Explanation: 

Detailed explanation-1: -Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart.

Detailed explanation-2: -The daily pattern of two high tides is a familiar feature of Britain’s seaside resorts, but its cause is surprisingly subtle. Roughly speaking, it’s the result of the level of the sea rising as the Earth’s rotation brings it into two positions: first, directly facing the Moon, and second, facing away from it.

Detailed explanation-3: -The highest tides in the world can be found in Canada at the Bay of Fundy, which separates New Brunswick from Nova Scotia. The highest tides in the United States can be found near Anchorage, Alaska, with tidal ranges that average around 30 feet .

Detailed explanation-4: -The moon’s gravitational pull on the Earth and the Earth’s rotational force are the two main factors that cause high and low tides. The side of the Earth closest to the Moon experiences the Moon’s pull the strongest, and this causes the seas to rise, creating high tides.

Detailed explanation-5: -In general, most areas have two high tides and two low tides each day. When the two highs and the two lows are about the same height, the pattern is called a semi-daily or semidiurnal tide. If the high and low tides differ in height, the pattern is called a mixed semidiurnal tide.

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