chapter 29.2 Flashcards
is an area 15 degrees wide in the time is the same
time zone
the spinning of earth on its axis
rotation
is the motion of earth is an elliptical orbit around the sun
revolution
defend as the plane of earth’s orbit around the sun
ecliptic
when earth’s rotational axis titled directly toward the sun or away from the sun
solstice
earth’s 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?
babalonions
what was the symbol for degree taken from?
taken from the sun
how many degrees does the earth spin in one day?
360
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
how many time zones are there in the world
which direction do you move add hours to the time
east
which direction do you move to subtract hours from the time
how many time zones are there in the US
what are the names of time zones
atlantic/
what is solar day?
what is a sidereal day
which are the two main reasons for seasons
revolutions
2 seasons have a solstice
winter & summer
which month is the summer solstice
december 21st
winter solstice
two seasons of equinoxes
month is the spring equinox
month is the fall equinox
semptember 21st
longest day of the year
june 21st
shortest day of the year
december 21st
when are the days almost 12 hours of day and 12 hours at night
