1. 4.2 Earth’s Rotation Rotation Earth spinning on its axis
Earth takes 24 hours or 1 day to make one complete rotation
Rotation causes day and night

2. Evidence of Earth’s rotation
Foucault’s Pendulum
Pendulum swing changed every hour, evidence that earth was turning under it
Coriolis Effect
Winds are deflected (turned) toward the west….due to Earth spinning or rotating toward the east
Evidence of Earth’s rotation

4. Axis
Earth is tilted on its axis 23.5o

6. Time
24 hours in one day
24 standard time zones on Earth (15o of longitude each)

7. Prime Meridian
Move westward – move clocks back to an earlier time
Move eastward – change clocks to a later time

8. International Date Line
When travelers cross the International Date Line, they change their calendar by one day
Move westward, go ahead a day