The World Ocean (Ch. 7)

The crest of an ocean wave is analogous to what part of a tide?

High tide

The wave height, H, of an ocean wave is analogous to what part of a tide?

Tidal range

In the Equilibrium Tide Model predicts two tidal bulges. The tidal bulge on the side of the earth facing the moon is caused by what?

gravity

In the Equilibrium Tide Model predicts two tidal bulges. The tidal bulge on the side of the earth opposite the moon is caused by what?

Centrifugal force

The lunar day is 24 hr 50 min, but the solar day is 24hr. Why the difference?

The Moon (and the lunar bulge) moves around the Earth

Suppose you are a Superhero. With what super-human feat could you increase the length of a tidal day?

Speed-up the rotation of the moon around the earth

A semi-diurnal tidal pattern has ____ high tides and _____ low tides per lunar day.

2, 2

During the ____ and _____ moon phases you experience _____ tides.

1st & 3rd / neap

During the _____ moon phase we observe a ____ tidal range.

New & full / maximum

A maximal tidal range is observed when what?

Earth, moon and sun are lined-up

Why are spring tides highest when the Moon is near perigee?

The Moon is closer to the Earth, so gravitational force is greater

Why does doubling the distance between the Earth and moon have a disproportionally large effect on gravitational attraction than doubling the moon's mass?

because distance is raised to the power of 2

The current that is created from an out-going tide is a _____ current.

Ebb

What are the two moon phases associated with a spring tide during a typical lunar month?

new and full moons

During a neap tide, the tidal range is very small, because of the opposing gravitational attractions of the sun and moon. This is similar to what phenomenon you learned about in the waves chapter?

destructive interference

What the two most common periods for the tides?

diurnal and semidiurnal

During what moon phase are you most likely to experience a spring tide?

full moon

Which ONE of the following below describes a typical semidiurnal tide pattern?

two low tides and two high tides per day

The equlibrium model of the tides predicts what type of tide?

semidiurnal

Why does the distance between two astronomical bodies such as the Moon and Sun have a larger impact on Earth's tides than the masses of the two bodies?

Because distance is raised to the power of 2 and mass is to the power of one.

At what position in an amphidromic system is the tidal range equal to zero?

At the node, or amphidromic point

High tide corresponds to what part or characteristic of a wind-generated wave?

crest