Sun-Earth-Moon System Notes. Moon Phases. Rotation. Earth Spinning on its axis Causes day & night Takes 24 hours Moon Spinning on its axis Takes 27.3 days. Revolution. Movement of an object around another object Earth & Sun Moon & Earth Earth Year = 364 ¼ days Moon Year = 27.3 days
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Sun-Earth-Moon System Notes Moon Phases
Rotation • Earth • Spinning on its axis • Causes day & night • Takes 24 hours • Moon • Spinning on its axis • Takes 27.3 days
Revolution • Movement of an object around another object • Earth & Sun • Moon & Earth • Earth Year = 364 ¼ days • Moon Year = 27.3 days • Moon’s rotation (1 day) is equal to Moon’s revolution (27.3 days)
Moon Phases • Caused by the positions of the Moon, Earth & Sun • Phase of the Moon you see depend on how much of the sunlit side of the Moon faces the Earth • Moon goes through all phases during every revolution (8 Phases Total)
Eclipse • When an object in space comes between the Sun and a 3rd Object then a shadow is cast on that object.
Solar Eclipse • Moon passes between Earth & the Sun • Blocking light from reaching the Earth • SunMoonEarth
Lunar Eclipse • Occurs at Full Moon • Earth is between the Moon & Sun • Earth blocks sunlight from reaching the Moon • Moon appears dark • SunEarthMoon
Tides • The rise and fall of the level of water every 12.5 hours • It rises for 6 hrs then falls for 6 hrs • Tides occur mainly because of difference in how much the Moon pulls on different parts of Earth • Gravity = main factor
Spring Tides • High tides = high water level • Low tides = low water level • Happens twice a month when the Earth, the Sun, and the Moon are nearly in a straight line. • Occur during the Full Moon and the New Moon
Neap Tides • High tides = low water level • Low tides = high water level • Happens twice a month when the Earth, the Sun, and the Moon are at Right (90°) Angles. • Occur during the Quarter Moons