Dynamic Definitions
The imaginary line that passes through Earth’s center and poles
What is axis?
Summer solstice is on or around this date.
What is June 21?
Season in the Southern Hemisphere on September 23
What is spring?
Number of hours in one day
Season when bears hibernate
What is winter?
The imaginary line that divides Earth into northern and southern hemispheres
What is the equator?
Winter solstice is on or around this date.
What is December 21?
Seasons that begin in the northern hemisphere when direct rays of the sun are on the equator
What are spring and fall?
Number of days in one year
What is 365 1/4 days?
Season when leaves fall as trees begin to "shut down" due to shortened daylight hours
What is autumn?
The spinning of Earth on its axis
What is rotation?
Autumnal equinox is on or around this date.
What is September 23?
Season that begins in the northern hemisphere when direct rays of the sun are on the Tropic of Cancer
What is summer?
Number of degrees in the tilt of Earth's axis
What is 23.5°?
Month when Earth is farthest from the sun
What is July?
The movement of Earth around the sun
What is revolution?
Vernal equinox is on or around this date.
What is March 21?
Season that begins in the northern hemisphere when direct rays of the sun are on the Tropic of Capricorn
What is winter?
Number of years from one leap year to the next
What is 4 years?
Number of hours of daylight on June 21 (near Massachusetts)
What is 15 hours of daylight?
Another word for revolution
What is orbit?
Alien pick-up line
What is "Hey baby, you're out of this world!?"
Pole that is in complete darkness on Dec. 21
What is the North Pole?
Number of times the Earth fully rotates in one year?
What is 365 times?
Meaning of equinox
What is "equal night?"