Tides and Eclipses Review

Neap tides have the smallest difference between high tides and low tides. Which moon positions will create neap tides?

• A or B

• A or C

• B or D

• B or C

Answer explanation

Neap tides occur when the sun and moon are at right angles to each other, creating the smallest difference between high and low tides. This happens during moon positions A or C.

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Spring tides have the highest high tides and the lowest low tides. Which moon positions above would create spring tides?

• A or B

• A or C

• B or D

• B or C

Answer explanation

The moon positions B or D would create spring tides, resulting in the highest high tides and lowest low tides.

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NGSS.MS-ESS1-1

Why does the moon have a greater tidal effect than the Sun?

• The moon has more mass than the Sun

• The moon rotates faster than the Sun

• The moon is a solid and the Sun is a gas

• The moon is closer to the Earth than the Sun

Answer explanation

The moon is closer to the Earth than the Sun, resulting in a greater tidal effect due to the inverse square law of gravity.

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Which of the diagrams below most accurately represents the effects of the moon on the Earth's tides?

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How does the distance of the moon from Earth affect the tides?

• Greater distance increases tidal effects

• Greater distance decreases tidal effects

• Distance has no effect on tides

• Only the sun's distance affects tides

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NGSS.MS-ESS1-1

How many tides occur within a 24 hour period?

• 6
• 4
• 2
• 8

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Draw the moon and sun in the correct alignment with Earth for a lunar eclipse to occur.

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