1. Topic: Earth’s Motions

2. Rotation Earth spins on its axis at a rate of _ o /hr __ mph at the Equator __ mph at our latitude Do you feel it?

3. Looking down on the Earth's North Pole, it is ____

4. Prove Earth Rotates!

5. http://commons.wikimedia.org/wiki/Image:Foucault_pendulum_animated.gif ____

7. Star Trails

8. Star trails also show that Earth rotates

9. Credit & Copyright: Wally Pacholka Polaris

10. Remember how to find Polaris (North Star)?

11. Coriolis Effect Northern hemisphere objects deflect: _____ Southern hemisphere objects deflect: _____

13. Navigators must allow for deviation to right when flying in northern hemisphere -- and to left in southern hemisphere. The rotation of the earth creates special problems on flights to and from the moon.

15. Periods of Rotation Sidereal Day: based on position of stars = 23 hrs 56 min 4 sec Page 15 of ESRT!! Synodic Day: based on position of Sun = 24 hrs

16. Sidereal Day—ESRT pg 15

17. 1)Rotation  Spins on axis __°/hr  Evidence 1)__ 2)__ 3)__  Period of rotation  Sidereal ___  Synodic ___  Effects 1) ___

18. Revolution Sun

19. Fastest human = ~27 mph Cheetah = 46 mph Fastest car = 267 mph Planes = up to 2,200 mph Earth revolves around sun = ___ mph

21. Constellations

22. ESRT pg 15

23. 2) Revolution ___ Evidence 1)___ Period of revolution ___

24. FQ: What causes the Coriolis Effect? How does it effect the Northern Hemisphere? ____