A review of phases, eclipses, and tides.
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| How long does it take for the Moon to complete one revolution around the Earth? | 27.3 days
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| What causes phases of the Moon? | The position of the Moon around the Earth and how much of the sunlit side of the Moon faces Earth.
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| Why do we always see the same side of the Moon? | Because the Moon rotates at the same rate that it revolves.
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| Which Moon phase would you see a small sliver of light on the right side of the Moon? | Waxing crescent
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| Which Moon phase would you see most of the Moon full, however there is a small amount of darkness on the right side of the Moon? | Waning gibbous
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| Which Moon phase occurs when the Moon is between the Sun and Earth? | New Moon
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| How long does it take for the Moon to start at a new Moon phase and return to a new Moon phase? | 29.5 days
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| Which Moon phase does the Moon appear 1/2 lit and the light is on the right side? | First-quarter
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| When an object in space comes between the Sun and a third object in space, a(n) ___________________ occurs. | Eclipse
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| A _______________ eclipse occurs when the Moon comes directly between the Sun and Earth. | Solar
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| A _______________ eclipse occurs when the Earth comes directly between the Sun and Moon. | Lunar
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| The ________________ is the darkest part of the shadow. | Umbra
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| The _________________ is the largest part of the shadow, but is less dark than the umbra. | Penumbra
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| A lunar eclipse occurs only during a _______________ Moon phase. | Full
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| A solar eclipse occurs only during a _______________ Moon phase. | New
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| Why isn't there an eclipse every time there's a full or new Moon? | Because the Moon's orbit is tilted around the Earth. As a result, the Moon rarely falls into the Earth's shadow, and the Earth rarely falls into the Moon's shadow.
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| If you were on Earth during a solar eclipse, and suddenly it became completely dark out. What would you see in the sky from Earth? | A total solar eclipse. The Moon would be blocking the sunlight.
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| What type of eclipse is viewable by more people and why? | A lunar eclipse. Because everyone on the dark side of the Moon can see the lunar eclipse, while only those in the Moon's small umbra can see the solar eclipse.
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| This is the rise and fall of ocean water. | Tides
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| What causes tides? | Mainly how much of the Moon's gravity pulls on different parts of Earth.
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| Where on Earth will there be high tides? | The place on Earth closest to the Moon, and the place on the other side of the Earth, farthest from the Moon.
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| During which Moon phases does a spring tide occur? | New Moon and full Moon
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| What happens to high and low tides during a spring tide? | There is a great difference between high and low tides.
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| During which Moon phases does a neap tide occur? | First-quarter and third-quarter
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| What happens to high and low tides during a neap tide? | There is not a great difference between high and low tides.
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| If you went to the beach a 9 am and there was a high tide, at what time could you expect the low tide to arrive? | 3 pm
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| If you went to the beach a 9 am and there was a high tide, at what time could you expect the next high tide to arrive? | 9 pm
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| How many high tides and low tides does one location on the shore have a day? | 2 high and 2 low
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| Why does the Moon's gravity have a greater effect on Earth's ocean tides than the Sun's gravity? | Because the Moon is closer.
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