Question 1

What body generates the strongest tractive forces?

Accepted Answer

A)  The moon 
B)  The sun 
C)  The Earth 
D)  the moon and the sun 
A)  The moon 
B)  The sun 
C)  The Earth 
D)  the moon and the sun A

Question 2

A tidal or lunar day is every 24 hours.

Accepted Answer

A) True 
 B)False  False

Question 3

Can tides be predicted? Explain why or why not and give examples of factors that may render tidal predictions inaccurate.

Accepted Answer

Given the complexity of and the multiple variables involved in tidal cycles, it is hard to imagine that most tides can be very accurately predicted both in terms of time and height. Currently, tidal height can be predicted to an accuracy of about 3 m for years in advance. Despite the accuracy, local tidal height can be greatly influenced by strong winds or tidal surges.

Question 4

The type of tide associated with the full and new moons are:

Accepted Answer

A)  neap tides. 
B)  spring tides. 
C)  diurnal tides. 
D)  tidal currents. 
A)  neap tides. 
B)  spring tides. 
C)  diurnal tides. 
D)  tidal currents.

Question 5

Which of the following statements best characterizes neap tides?

Accepted Answer

A)  Neap tides occur when the moon, Earth and sun form a right angle. 
B)  Neap tides represent extreme tidal ranges. 
C)  Neap tides occur at the new and full moons every month. 
D)  Neap tides correspond with the timing of spring tides. 
A)  Neap tides occur when the moon, Earth and sun form a right angle. 
B)  Neap tides represent extreme tidal ranges. 
C)  Neap tides occur at the new and full moons every month. 
D)  Neap tides correspond with the timing of spring tides.

Question 6

Which of the following bodies is the largest?

Accepted Answer

A)  Earth. 
B)  Sun. 
C)  Moon. 
D)  Mars 
A)  Earth. 
B)  Sun. 
C)  Moon. 
D)  Mars

Question 7

The tidal pattern characteristic of the west coast of the United States is:

Accepted Answer

A)  mixed tides. 
B)  diurnal tides. 
C)  reversing tides. 
D)  amphidromic tides. 
A)  mixed tides. 
B)  diurnal tides. 
C)  reversing tides. 
D)  amphidromic tides.

Question 8

An amphidromic point is a:

Accepted Answer

A)  no tide point in the ocean around which the tide crest rotates through one tidal cycle. 
B)  place in the ocean where tides are highest. 
C)  place in the ocean where tidal datum is displaced to the right (in the northern hemisphere), or to the south (in the southern hemisphere). 
D)  no tide point at the coast where there is a daily high tide, but no low tide. 
A)  no tide point in the ocean around which the tide crest rotates through one tidal cycle. 
B)  place in the ocean where tides are highest. 
C)  place in the ocean where tidal datum is displaced to the right (in the northern hemisphere), or to the south (in the southern hemisphere). 
D)  no tide point at the coast where there is a daily high tide, but no low tide.

Question 9

Tides are shallow-water waves. Explain this statement.

Accepted Answer

Tides are the longest of all ocean waves

Question 10

Because of the combination of gravitational and inertial forces, tides are unpredictable.

Accepted Answer

A) True 
 B)False

Question 11

Slack water:

Accepted Answer

A)  occurs at high tide. 
B)  occurs at low tide. 
C)  occurs when the current is changing direction. 
D)  occurs midway between high and low tide. 
A)  occurs at high tide. 
B)  occurs at low tide. 
C)  occurs when the current is changing direction. 
D)  occurs midway between high and low tide.

Question 12

A meteorological tide is caused by:

Accepted Answer

A)  rogue waves. 
B)  storms. 
C)  ebb currents. 
D)  gravity and inertia. 
A)  rogue waves. 
B)  storms. 
C)  ebb currents. 
D)  gravity and inertia.

Question 13

The only marine energy source being successfully exploited on a large scale is:

Accepted Answer

A)  tidal power. 
B)  storm waves. 
C)  salinity differences. 
D)  thermal gradient. 
A)  tidal power. 
B)  storm waves. 
C)  salinity differences. 
D)  thermal gradient.

Question 14

For tides as long waves, the amphidromic point corresponds to the wave crest.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A)  low tide. 
B)  time of no tidal action. 
C)  high tide also. 
D)  tide that cannot be predicted. 
A)  low tide. 
B)  time of no tidal action. 
C)  high tide also. 
D)  tide that cannot be predicted.

Question 16

Tidal bores usually occur:

Accepted Answer

A)  in rivers or long narrow bays. 
B)  in open ocean far from land. 
C)  around islands. 
D)  in enclosed basins such as the Mediterranean. 
A)  in rivers or long narrow bays. 
B)  in open ocean far from land. 
C)  around islands. 
D)  in enclosed basins such as the Mediterranean.

Question 17

Which of the following statements is FALSE concerning the equilibrium theory of tides?

Accepted Answer

A)  The theory assumes that the seafloor does not influence tides. 
B)  The theory states that the surface of the ocean cannot conform to the combination of forces acting on it. 
C)  The theory presumes the surface of the ocean does conform to acting forces. 
D)  The theory states that there is a balance between all of the forces that influence the surface of the ocean including those that allow Earth to stay in stable orbit around the sun. 
A)  The theory assumes that the seafloor does not influence tides. 
B)  The theory states that the surface of the ocean cannot conform to the combination of forces acting on it. 
C)  The theory presumes the surface of the ocean does conform to acting forces. 
D)  The theory states that there is a balance between all of the forces that influence the surface of the ocean including those that allow Earth to stay in stable orbit around the sun.

Question 18

The reference level to which tidal height is compared is called the:

Accepted Answer

A)  sea level of spring tides. 
B)  tidal datum. 
C)  maximum range. 
D)  tidal variance. 
A)  sea level of spring tides. 
B)  tidal datum. 
C)  maximum range. 
D)  tidal variance.

Question 19

Tractive forces include gravitational forces from both the moon and the sun.

Accepted Answer

A) True 
 B)False

Question 20

A steep wave moving upstream generated by the action of the tide crest in the enclosed area of a river mouth is called a:

Accepted Answer

A)  tidal node. 
B)  tidal wave. 
C)  tidal surge. 
D)  tidal current. 
A)  tidal node. 
B)  tidal wave. 
C)  tidal surge. 
D)  tidal current.

What body generates the strongest tractive forces?

A tidal or lunar day is every 24 hours.

Can tides be predicted? Explain why or why not and give examples of factors that may render tidal predictions inaccurate.

The type of tide associated with the full and new moons are:

Which of the following statements best characterizes neap tides?

Which of the following bodies is the largest?

The tidal pattern characteristic of the west coast of the United States is:

An amphidromic point is a:

Tides are shallow-water waves. Explain this statement.

Because of the combination of gravitational and inertial forces, tides are unpredictable.

Slack water:

A meteorological tide is caused by:

The only marine energy source being successfully exploited on a large scale is:

For tides as long waves, the amphidromic point corresponds to the wave crest.

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

Tidal bores usually occur:

Which of the following statements is FALSE concerning the equilibrium theory of tides?

The reference level to which tidal height is compared is called the:

Tractive forces include gravitational forces from both the moon and the sun.

A steep wave moving upstream generated by the action of the tide crest in the enclosed area of a river mouth is called a:

The Origin of the Ocean

A History of Marine Science

Earth Structure and Plate Tectonics

Ocean Basins

Ocean Sediments

Water

Atmospheric Circulation

Ocean Circulation

Waves

Coasts

Life in the Ocean

Pelagic Communities

Benthic Communities

Uses and Abuses of the Ocean

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Exam 10: Tides

What body generates the strongest tractive forces?

A tidal or lunar day is every 24 hours.

Can tides be predicted? Explain why or why not and give examples of factors that may render tidal predictions inaccurate.

The type of tide associated with the full and new moons are:

Which of the following statements best characterizes neap tides?

Which of the following bodies is the largest?

The tidal pattern characteristic of the west coast of the United States is:

An amphidromic point is a:

Tides are shallow-water waves. Explain this statement.

Because of the combination of gravitational and inertial forces, tides are unpredictable.

Slack water:

A meteorological tide is caused by:

The only marine energy source being successfully exploited on a large scale is:

For tides as long waves, the amphidromic point corresponds to the wave crest.

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

Tidal bores usually occur:

Which of the following statements is FALSE concerning the equilibrium theory of tides?

The reference level to which tidal height is compared is called the:

Tractive forces include gravitational forces from both the moon and the sun.

A steep wave moving upstream generated by the action of the tide crest in the enclosed area of a river mouth is called a:

The Origin of the Ocean

A History of Marine Science

Earth Structure and Plate Tectonics

Ocean Basins

Ocean Sediments

Water

Atmospheric Circulation

Ocean Circulation

Waves

Coasts

Life in the Ocean

Pelagic Communities

Benthic Communities

Uses and Abuses of the Ocean

Filters