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Earth,Moon, and Sun
Earth in Space
8
Science
6th Grade
10/15/2006

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Cards

Term
Astronomy
Definition
The study of the moon, stars and other objects in space
Term
Calendar
Definition
A system of organizing time that defines the beginning, length, and divisions of a year.
Term
Rotation
Definition
The spinning of Earth on its axix. Earth's rotation takes 24 hours or 1 day.
Term
Axis
Definition
The imaginary line that passes through Earth's center and the North and South poles.
Term
Revolution
Definition
The movement of one object around another. Earth revolves around the sun. It takes appoximately 365 1/4 days to complete one revolution.
Term
Equinox
Definition
Neither end of Earth's axis is tilted toward the sun. Both hemispheres receive the same amount of energy. Equal day and night.
Term
Solstice
Definition
When the sun reaches its greatest distance north or south of the equator. The longest and shortest days occurs at opposite hemispheres. Summer solstice is June 21st and winter solstice is December 21st.
Term
Orbit
Definition
The path one object follows around another. Earth's orbit around the sun is not quite circular. Its elongated or ellipse.
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