a half of the earth
Position of the Earth
day and night are equal length
sun reaches its highest or lowest point at noon
marked by longest and shortest days of the year
summer, spring, fall, winter
sun crosses the equator
divided by an imaginary line passing through the equator or poles
23.5 degrees
twice a year
the action of the earth
another word for "spin"
Summer and Winter
Northern and Southern/Eastern and Western
result from Earth's changing position in relation to the sun
each division of the year
September 22 and March 20
