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21 Cards in this Set
- Front
- Back
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the curved path the Earth takes as it goes around the sun
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axis
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the shape of the earth
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sphere
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earth's yearly orbit around the sun
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revolution
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the spinning of the Earth on its axis
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rotation
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the imaginary line around which a planet such as earth spins
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ellipse
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when the sun's position is directly over the Earth's equator
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Equinox
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when the moon's shadow falls on the earth
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solar eclipse
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when the Earth's shasow falls on the moon
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lunar eclipse
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the changing appearance of the moon as seen from Earth
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Moon phases
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the point at which the ssun reaches its greatest distance north or south of the equator
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solstice
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a total solar eclipse can only be seen by people in the area or the Earth within the _____________________
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moon's umbra (dark shadow)
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the Earth rotates on its axis once every _____
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day
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night and day are caused by the ____ of the Earth
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rotation
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Which spacecraft provided data for a detailed map of the moon's surface?
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Clementine
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Scientists have been able to develop a model of the moon's interior structure by studying _______________.
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moonquakes
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What begins in June in the northern hemisphere and in December in the southern hemisphere?
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summer solstice
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Daylight hours are _________ for the hemisphere tilted toward the sun.
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longer
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The ______________ occurs in September and the _____________ occurs in March for the northern hemisphere.
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fall equinox
spring equinox |
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After a full moon , when less of the moon's lighted side becomes visible, the phases are __________.
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waning
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Hours of daylight and nighttime are equal during the _____________.
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equinox
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The moon revolves around ________.
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Earth
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