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Ocean Tides (Grade 9)

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Ocean Tides

What is represented by the diagram below?
Neap Tide
  1. neap tide
  2. spring tide
  3. solar eclipse
  4. lunar eclipse
What is tidal range?
  1. how high a tide is
  2. how low a tide is
  3. the difference between high tide and low tide
  4. the place where the tide stands still
How often do spring and neap tides each occur?
  1. once a month
  2. twice a month
  3. once every week
  4. twice per year
Which statement best describes tides experienced on Earth when the Sun, Moon, and Earth are positioned as shown in the diagram?
Spring Tide
  1. very high, high tides; very low, low tides
  2. very high, high tides; average low tides
  3. average high tides; very low, low tides
  4. average high tides; average low tides
Which force is the driving mechanism of ocean tides?
  1. normal force
  2. frictional force
  3. magnetic force
  4. gravitational force
The two high tides and two low tides that occur each day are known as                 tides.
  1. neap
  2. spring
  3. diurnal
  4. semidiurnal
Look at the tidal bulge on the side of Earth (B) near E. Which statement best describes the tide occurring here?
Neap Tide
  1. ebb tide
  2. low tide
  3. high tide
  4. slack tide
Which word best describes ocean tides?
  1. annual
  2. cyclical
  3. seasonal
  4. unpredictable
The diagrams below show the positions of the Sun (A), Earth (B), and Moon (C). Which diagram represents when a full moon would be observed from Earth's surface?
  1. Neap Tide 2
  2. Spring Tide 2
  3. Neap Tide
  4. Spring Tide
Ocean water height is monitored at the Coastal Beach Lifeguard Station. On a certain day, the following measurements are recorded:

7:00 am - 6.4 m
9:00 am - 6.7 m
2:00 pm - 1.1 m
5:00 pm - 3.2 m
7:00 pm - 4.8 m

Between which two times does an ebb tide occur?
  1. 7:00 am and 9:00 am
  2. 9:00 am and 2:00 pm
  3. 2:00 pm and 5:00 pm
  4. 5:00 pm and 7:00 pm
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