Tides and Their Causes
Physics ⇒ Earth and Space Physics
Tides and Their Causes starts at 8 and continues till grade 12.
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A coastal city experiences its first high tide at 6:00 AM. At approximately what time will the next high tide occur?
Describe how the alignment of the Sun, Moon, and Earth affects the magnitude of tides.
Describe the difference between spring tides and neap tides.
Describe the effect of the Sun's position relative to the Moon on the occurrence of neap tides.
During which lunar phases do spring tides occur?
Explain why the tidal bulge on the side of Earth opposite the Moon occurs.
Explain why there are generally two high tides and two low tides each day at most coastal locations.
A coastal city experiences its first high tide at 6:00 AM. At approximately what time will the next high tide occur?
Which of the following best describes a neap tide?
(1) A tide with the greatest difference between high and low water
(2) A tide with the least difference between high and low water
(3) A tide that occurs only in winter
(4) A tide caused only by the Moon
Which of the following best describes a spring tide?
(1) A tide with the least difference between high and low water
(2) A tide with the greatest difference between high and low water
(3) A tide that occurs only in spring
(4) A tide caused only by the Sun
Which of the following best explains why the Sun, despite being much more massive than the Moon, has a smaller effect on Earth's tides?
(1) The Sun is much farther from Earth than the Moon.
(2) The Sun's gravity is weaker than the Moon's.
(3) The Sun's effect is canceled by Earth's rotation.
(4) The Sun does not exert a gravitational force on Earth.
Which of the following is NOT a factor that affects the magnitude of tides?
(1) The alignment of the Sun, Moon, and Earth
(2) The distance between the Moon and Earth
(3) The shape of the coastline
(4) The color of the ocean water
The difference in height between consecutive high and low tides is called the ________ range.
The period between two successive high tides at a given location is approximately ________ hours.
The tidal force is strongest when the Moon is at ________ (perigee/apogee) in its orbit around Earth.
The time interval between a high tide and the next low tide is approximately ________ hours.
True or False: Neap tides occur when the Sun, Moon, and Earth are aligned in a straight line.
True or False: The Earth's rotation has no effect on the timing of tides.
True or False: The Sun's gravitational pull on Earth is about 46% as strong as the Moon's in producing tides.
True or False: Tidal forces are a result of the difference in gravitational pull on different parts of the Earth.
