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31 Cards in this Set
- Front
- Back
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Eclipse
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Partial obscuring or darkening of one celestial body by another
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Umbra
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Dark center of a shadow
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Penumbra
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lighter outer region of a shadow
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Opaque
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object through which no light can pass
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Penumbral Lunar Eclipse
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When moon enters only the penumbral shadow of the earth
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Total Lunar Eclipse
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when moon is entirely immersed within the umbral shadow
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Red
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Longest wavelength of light in the color spectrum
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T/F? The word lunar means sun.
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False. The word lunar means of or pertaining to the moon.
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T/F? A fact is something which has been proven to be true.
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True.
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T/F? Eclipses occur once every month.
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False.
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T/F? Spacecraft orbit the earth in a circular orbit
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False
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T/F? A penumbral shadow is cast when the light source is smaller than the object.
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False
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T/F? A total solar eclipse is seen by people living in the path of the umbral shadow
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True
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T/F? An annual solar eclipse occurs when the moon is at its farthest point from the earth during a total eclipse.
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True
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T/F? A penumbra is the halo surrounding the sun which is seen during a total solar eclipse.
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False
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Which United States time zone has the earliest time?
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Aleutian/Hawaii
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Planet Earth is tilted approximately ______ degrees
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23 1/2
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_____ and ____ helps the earth continue to go around the sun.
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Gravity and Inertia
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Every fourth year is called a(n) _____ year.
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Leap Year
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The average distance from the earth to the sun is _____ miles.
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93 million
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During a lunar eclipse the moon appears to be darkened because _____ is casting a shadow on it.
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The earth.
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Since the moon is so small in size in relation to the earth, only a small area of planet earth will see a _____.
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Solar Eclipse
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During what season is there 24 hours of daylight at the North Pole?
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Summer
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One orbit of the earth around the sun equals ______ miles.
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595 Million
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What does the word Vernal mean?
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"Of Spring"
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A _____ takes place when the sun, earth and moon are in nearly a straight line with the earth being between the sun and the moon.
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A Lunar Eclipse
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A penumbral lunar eclipse takes place when the moon enters only the ______ shadow of the earth.
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Penumbral
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During a lunar eclipse, the moon appears to be darkened because ____ is casting a shadow on it.
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The Earth
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A(n) _____ occurs when the moon enters the umbral shadow of the earth without being entirely immersed in it.
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Partial Lunar Eclipse
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Since the moon is so small in size in relation to the earth, only a small area of the planet earth will see a ________
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Solar Eclipse
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The moon appears red during a lunar eclipse because red is the _____ wavelength of light in the color spectrum present in sunlight
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Longest
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