chapter 29.2 Flashcards
an area 15 wide in which the time is the same
time zone
is the spinning of earths on its axis an imaginary line drawn from earths north pole to its south pole
rotation
motion earth in an elliptical orbit around the sun
revolution
defined as the plane of earths orbit around the sun
ecliptic
occurs when earth rotational axis is tilted directly toward the sun or away from the sun
solstice
earths rotational axis is perpendicular to a line drawn from the center of earth to the center of the sun
equinox
who devised a method of timekeeping around 3000 B.C
babylonians
what was the symbol for degree taken from
the sun
how many degrees does the earth spin in one day
360 degrees
how many hours does it take the earth to make one full rotation
24 hours
how many degrees does the earth spin in one hour
15 hours
what direction does the sun rise
east
what direction does the sun set
west
true or false. all time zones are the exact same size
False they are modified to fit around cities,states,and country borders,and other key sites
how many time zones are there in the world
what direction do you move to add hours to the time
east add hour
which direction do you move to subtract hours from the time
how many time zones are there in the united states
6
what are the names of the time zones
atlantic/atlastic Pacific time zone central eastern hawain time zone
what is a solar day
what is a sidereal day
what are the two main reasons for seasons
revolutions
which two seasons have a solstice
winter and summer
which month is the summer solstice
December 21st
which month is the winter solstice
which two seasons are equinox
what month is the spring equinox
longest day of the year
june 21st
shortest day of the year
December 21st
