Astronomy 6: What Causes Tides?

What are the TWO main causes of tides?

• the Moon’s gravitational pull

• the Sun’s gravitational pull

• Jupiter’s motion in space

• the distance between Earth and Mars

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Most places on Earth experience about how many high tides and low tides in 24 hours and 50 minutes?

• 2 high and 2 low tides

• 4 high and 4 low tides

• 1 high and 1 low tide

• 1 spring tide and 1 neap tide

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What type of tide occurs during the New and Full Moon phases?

• Neap tide

• Spring tide

• Lunar tide

• rip tide

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What type of tides occur during the First or Last Quarter Moon?

• Neap tides

• Spring tides

• Lunar tides

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What type of tides would this arrangement of Earth-Moon-Sun create?

• neap tide

• spring tide

• new moon tide

• full moon tide

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What type of tide would this arrangement of Earth-Moon-Sun create?

• full moon tide

• new moon tide

• neap tide

• spring tide

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Neap tides occur

• once a day

• twice a day

• once a month

• twice a month

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The difference between the ocean level at high tide and low tide is known as

• tides

• tidal range

• spring tides

• neap tides

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Why does the Moon have a greater effect on tides than the Sun does?

• the Sun consists of plasma

• the Moon is larger than the sun

• the Moon is farther from Earth

• the Moon is closer to Earth

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Which areas are experiencing high tides?

• 1 and 5
• 2 and 6
• 3 and 7
• 4 and 8

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