Oceanography Questions
Duxbury Chapter 11

  1. What is the relative tidal effect on the earth of the moon and sun?
    The moon exerts ten times the force of the sun.
    The moon exerts twice the force of the sun.
    The sun exerts ten times the force of the moon.
    The sun exerts twice the force of the moon.
    They exert the same force.

  2. What is the formula for the tide-generating force?
    รพ m1 m2 / r3
    G m1 m2 / r2
    m a
    m c2
    pi r3

  3. Where is the barycenter?
    Half way between the earth and the moon
    One fourth of the way to the moon
    One tenth of the way to the moon
    One twentieth of the way to the moon
    Within the earth

  4. How many bulges are generated by the tide-raising force on the earth at one time?
    1
    2
    3
    4
    5

  5. How many high tides occur per day in most coastal areas?
    1
    2
    3
    4
    5

  6. How often does the moon pass overhead as seen from the earth?
    Every 12 hours
    Every 24 hours
    Every 24 hours and 50 minutes
    Every month
    Every two weeks

  7. What are tides that peak about once a day called?
    Diurnal tides
    Equatorial tides
    Neap tides
    Semidiurnal tides
    Spring tides

  8. What are tides of large amplitude that occur about every two weeks called?
    Diurnal tides
    Equatorial tides
    Neap tides
    Semidiurnal tides
    Spring tides

  9. According to equilibrium tidal theory, when should low tides occur?
    When the earth, moon, and sun are aligned
    When the moon is directly overhead
    When the moon is directly under foot
    When the moon rises in the east
    When the moon sets in the west

  10. When do periods of the greatest tidal range occur?
    When the earth, moon, and sun are aligned
    When the moon is directly overhead
    When the moon is directly under foot
    When the moon rises in the east
    When the moon sets in the west

  11. When would you expect to experience Spring tides?
    During a first quarter moon
    During a full moon
    During a last quarter moon
    During a new moon
    In the springtime

  12. What two factors determine whether a coast will experience diurnal or semidiurnal tides?
    Declination of the moon and basin resonance period
    Distance to the moon and basin resonance period
    Lunar phase and distance to the moon
    Lunar phase and the mood of the Pope
    Lunar phase and time of day

  13. How do tidal bulges tend to move in narrow open basins?
    They are synchronous with the overhead passing of the moon and sun.
    They are synchronous with their connecting oceans.
    They move in random, unpredictable patterns.
    They oscillate across nodal lines.
    They rotate around amphidromic points.

  14. How do tidal bulges tend to move in broad open basins?
    They are synchronous with the overhead passing of the moon and sun.
    They are synchronous with their connecting oceans.
    They move in random, unpredictable patterns.
    They oscillate across nodal lines.
    They rotate around amphidromic points.

  15. What is a typical tidal range at an amphidromic point?
    0 meters
    1 meter
    2 meters
    4 meters
    8 meters

  16. When do ebb currents occur?
    After high tide
    After low tide
    During high tide
    During low tide
    Only during Spring tides

  17. Which coast of North America typically experiences dirunal tides?
    East coast
    Gulf of Mexico
    Lake Ontario
    West coast

  18. Which coast of North America typically experiences mixed tides?
    East coast
    Gulf of Mexico
    Lake Ontario
    West coast

  19. Where are the greatest tidal ranges on earth found?
    In large lakes like Lake Ontario
    In narrow bays like the Bay of Fundy
    In polar oceans like the Arctic Ocean
    In the largest oceans, particularly the Pacific
    In wide bays like the North Sea

  20. What country has a working tidal power plant?
    France
    Great Britain
    Japan
    Russia
    United States

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