1. Space Cycle Notes
Created by Harris Middle School

2. Rotation vs. Revolution

3. Rotation: Revolution: spin of object on its axis
rotates counter-clockwise = west to east
= why sun appears to rise in the east and set in the west
for Earth = 24 hrs. =1 day
responsible for day vs. night
Revolution:
also called an orbit
path of one object around another
Earth around sun ≈ 365 days = 1 year
moon around Earth ≈ 1 month

4. The TILT is the reason for seasons!
The Earth is tilted on its axis by 23.5.°
As a result, the hemisphere that is tilted toward the sun receives more direct sunlight = more heat.
causes longer daylight hours
hotter temperatures = summer!
The hemisphere tilted away from the sun experiences winter.
The TILT is the reason for seasons!

5. For the Northern Hemisphere!
= least daylight hours
= most daylight hours
= Equal hours of day and night