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Earth, Moon, Stars

Chapter 5 Vocabulary--Section 1

AB
astronomystudy of moon, stars, & objects in space
rotationEarth spinning on axis
axisimaginary line passing through center of earth and poles
1 rotation =24 hours
1 revolution =approx. 365 days
Polarisaxis points at
North StarPolaris
orbitthe Earth's path around the Sun
revolutionEarth traveling around the Sun
leap year366 days
During leap, February has29 days
Tilted toward the Sun =summer
Tilted away from the Sun =winter
latitudedistance from equator, North & South
solsticeSun is directly overhead at 23.5 deg at noon
winter solsticeshortest day of year
summer solsticelongest day of year
equinoxEarth is not tilted toward or away from Sun
Vernal equinoxbeginning of spring
Autumnal equinoxbeginning of fall
in Marchvernal equinox
in Septemberautumnal equinox
in Junesummer solstice
in Decemberwinter solstice


Team Mosaic 8th gr. earth science
Timberlane Regional Middle School
Plaistow, NH

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