Chapter 2.2 Flashcards
rotation
Earth spinning on its axis - one rotation takes 24 hours.
perihelion
when the earth is closest to the sun
aphelion
when the earth is farthest away from the sun
summer solstice
when the suns rays hit the earth at a 90 degree angle along the Tropic of Cancer.
winter solstice
when the suns rays strike the earth at a 90 degree angle along the Tropic of Capricorn.
autumnal equinox
September 22-23, when the suns rays strike the earth at a 90 degree angle along the equator.
vernal equinox
March 21-22, when the suns rays strike the earth at a 90 degree angle along the equator
Equinox
meaning equal night, that the hours of darkness and daylight are equal everywhere on the earth that day.
precession
when the earth wobbles on its axis.
standard time zones
system where it is different times everywhere on earth.
International Date Line
where the day changes from one to the next.
daylight saving time.
when the clocks are set one hour ahead in April.
Revolution
movement of earth around the sun - takes 365.25 days.
