Chapter 9: Tides

______ tides are larger and occur when the Moon is aligned with the Sun and the Earth

Spring (Syzygy tidal cycle)

The moon does NOT rotate around the center of Earth.

True

A point in the ocean with no tide point around which the tide crest rotates through one tidal cycle is called a(n) ______ ______.

andphidromic point

The tides in each cell rotate around

anthrodromic points

What areas experience the biggest difference in water level between high tide and low tide?

areas farthest away from the amphidromic point

A common center of mass or balance point is called ______.

barycenter

Tides that have one high tide/one low tide per day and a period of 24 hrs and 50 min are known as ______ tides.

diurnal

What are the three types of tides?

diurnal, semidiurnal, mixed

The ______ theory of tides does a better job to explain the details of tides.

dynamic

In the ______ theory of tides, water is assumed to be in equilibrium with tide generating forces (the ocean conforms instantly to the forces that affect the position of its surface).

equilibrium

While the _______ theory of tides does explain the basic idea of tides, it does not do a great job with the detail of tides

equilibrium

Using the ______ tidal water for electricity involves a dam like structure to generate a difference in water height.

falling

Neap tides are small and coincide with the ______ and _____ quarter moon (quadrature).

first; third

In confined basins, tides are...

generally larger than along straight coastlines

Tides are caused by _______ ______ of the Sun, Moon, and the motion of Earth.

gravitational attraction

The side of the Earth facing the moon will experience a high tide, while the opposite side of the Earth will have a....

high tide also

Tides are the ______ waves in the ocean. These huge ______-______ waves are forced waves.

longest; shallow-water

The force of gravity is proportional to the ______ and inversely proportional to the square of the ______ between them.

masses; distance

Tides that have two high tides/two low tides per day and VARY in height (tidal range different) and are the most common tides are known as ______ tides.

mixed

Tide that occurs when destructive interference between lunar and solar bulges produce a small tidal range are called ______ tides.

neap

What tides occur when the Moon and Sun are at right angles from each other?

neap tides

When the Sun and Moon are at right angles to each other, the solar tide partially cancels out the lunar tide and produces moderate tides known as ______ ______.

neap tides

Spring tides coincide with the ______ and ______ moon

new; full

Tides that have two high tides/two low tides per day with the tidal range about the same and a period of 12 hrs and 25 min are known as ______ tides.

semidiurnal

Tide that occurs when constructive interference between lunar and solar bulges produce a large tidal range are called ______ tides.

spring

What tides occur when the Earth, Moon and Sun are alligned?

spring tides

In one solar day, the Moon moves ______ around the Earth

1/28th of a complete rotation

How long does it take the tide wave in each cell to complete one rotation?

12 hours

If today's high tide is at 1:00pm, what time will the same high tide be tomorrow?

1:50pm

How many spring and neap tides occur in a given month?

2 spring tides and 2 neap tides

One solar day is __ hours while one lunar day is __ hours and __ minutes

24; 24; 50

What causes night and day?

Earth's rotation on its axis

What is Newton's Law of Universal Gravitation?

F=Gm1m2/r^2

(T or F) Spring tides are associated with the spring season.

False. Spring tides get their names because the high tides seem to "spring" upward in height.

Where on Earth is the centripetal force towards the Moon the greatest?

It is constant everywhere on Earth

______ tides experience two high tides two low tides per day with varying tidal ranges.

Mixed

Moon phase in which the Moon between Earth and Sun, and cannot be seen from Earth.

New Moon

What are all the phases of the Moon?

New Moon Waxing Crescent First Quarter Waxing Gibbous Full Moon Waning Gibbous Third Quarter Waning Crescent

Tidal bores usually occur...

in rivers or long narrow bays

The force that keeps planets in orbit via gravitational attraction is known as ______ ______.

Centripetal Force (center-seeking force)

The ______ Ocean has the most complex of all tidal patterns

Pacific

______ tides experience two high tides and two low tides per day with tidal ranges being generally the same.

Semidiurnal

______ ______ is the difference between high and low tides.

Tidal range

(T or F) The Earth rotates counterclockwise on its axis (to the west)

True

The length of a lunar day is different from the length of a solar day because

the Moon revolves around Earth in the same direction that Earth is rotating on its axis

When the Sun and Moon are in line with Earth, what will happen in relation to tides?

the highest high and lowest low tides will occur

Using the ______ currents for does not require a dam like structure as it is powered by the flow of water.

tidal

A ______ ______ is a wall of water that surges upriver with the advancing high tide.

tidal bore

The time that passes between two high tides is known as the ______ ______.

tidal period

The vertical difference between high and low tides is known as ______ ______.

tidal range

What are the two ways electricity can be derived from tides?

- Using the falling tidal water - Using the tidal currents

Where on Earth is the gravitational attraction towards the Moon the greatest?

At the zenith

______ is the angular distance of the Moon or Sun above or below Earth's equator.

Declination

______ tides experience one high tide and one low tide per day.

Diurnal

Moon phase in which the Moon and Sun are on opposite sides of the Earth; Moon is fully visible.

Full Moon