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8-Earth,Moon, Sun
Earth, Moon Sun
Term | Definition |
---|---|
axis | an imaginary line that a sphere rotates around |
elliptical | oval shaped |
equator | the imaginary line around the horizontal center of the planet |
gibbous | the Moon that is almost fully illuminated by the Sun |
lunar eclipse | when Earth passes between the Sun and a full Moon |
orbit | the path an object takes as it revolves around another object |
revolution | a complete turn or orbit around a center |
rotate | a complete turn or orbit around a center |
seasons | the four natural divisions of the year based on changes in temperature due to varied amounts of sunlight (both the intensity and the number of daylight hours received); caused by the tilt of the Earth during revolution |
solar eclipse | when the new Moon passes directly between Earth and the Sun |
waning | the decreasing amount of the sunlit portion of the Moon's surface |
waxing | the decreasing amount of the sunlit portion of the Moon's surface |
Heliocentric Model | promoted by Nicolaus Copernicus and proven by Galileo - the planets orbit the sun |
Geocentric Model | promoted by Aristotle and Ptolemy - the sun and the planets orbit Earth |