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earth's rotation

spinning on its axis

what direction does earth rotate

counterclockwise or from east to west

length of earth's rotation

24 hours

how many degrees in earth's rotation

15 degrees per hour

earth's revolution

orbiting around the sun

how many degrees does earth turn per day

360 degrees per day

direction of earth's revolution

counterclockwise

length of one earth revolution

365 1/4 days

shape of earth's orbit

elliptical orbit

point when closest to the sun

perihelion

point when farthest away from the sun

aphelion

equinox

equal days and nights

vernal equinox

marks the 1st day of spring

date of the vernal equinox

March 21 or 22

location of the sun on the vernal equinox

equator

autumnal equinox

marks the 1st day of fall

date of the autumnal equinox

september 22 orr 23

location of the sun on the autumnal equinox

equator

summer solstice

marks the 1st day of the summer

date on the summer solstice

june 21 or 22

location of the sun on the summer solstice

tropic of cancer

winter solstice

marks the 1st day of winter

date of the summer solstice

december 21 or 22

location of the sun on the winter solstice

tropic of capricorn

zenith

a point directly overhead

Tilt of earth's axis

231/2 degrees

result of the tilt

seasons

latitude

any point north or south of the equator

latitude lines

parallels

direction of latitude lines

east and west

latitude of the equator

0 degrees

latitude of the tropic of cancer

231/2 north

latitude of the tropic of capricorn

231/2 south

latitude of the arctic circle

661/2 north

latitude of the antarctic circle

661/2 south

latitude of the north pole

90 north

latitude of the south pole

90 south

longitude

distances east or west of the prime meridian

longitude lines

meridians

direction of longitude lines

north and south

what degrees is the prime meridian

0 degrees

the prime meridian passes through what town

greenwich england

what degrees is the international date line

180degrees

where is the international date line

pacific ocean

shape of the international date line

zig zag

what is the purpose of the international date line

to off set the day

how do you change your clock when crossing the international date line

1 hour ahead or behind

how do you change the date when crossing the international date line

east to west you repeat the day and west to east you go ahead a day

one degree of longitude at the equator is equal to how many miles

70 miles

one degree of longitude at the poles is equal to how many miles

0 miles

standard time

the time in which our clocks run on

mean solar time

average sun time

daylight savings time

during summer clocks are set ahead one hour

when do you set your clocks

1st sunday in november and 2nd sunday in march

how do you set your clocks

spring ahead and fall back

eastern time zone

75 west

central time zone

90 west

mountain time zone

105 west

pacific time zone

120 west

how do you change your watch from going from one time zone to another

east to west back an hour
west to east ahead an hour

north dakota lies in which time zone

central and mountain

what is A.M. and P.M.

after midnight and past midnight

what is a sextant

used to determine latitude or the angle of the sun

chronometer

used to determine the time at greenwich england

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