Earth Motions

# Earth Motions

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## Earth Motions

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1. Earth Motions Astronomy Page 3

2. SWBAT: Define rotation and revolution and provide proof for both motions.

3. Set up your 30 fact cards • Fact cards are due

4. Do Now: Earth motions handout

5. Rotation • Definition: Spin on an axis • What is the direction of movement? Counterclockwise: West to East • How long does it take? 24 hours • What is the rate? 1070 mi/hr • Results of motion? Day and Night • How can you prove this motion? Foucault Pendulum and Coriolis effect • Coriolis Effect

6. Foucault Pendulum and Coriolis effect simulations Animation coriolis effect (2-11) - YouTube

7. Pitstop ActivityCoriolis Effect

8. Revolution • Definition: When the Earth makes a complete circle or orbit around the sun. • What is the direction of movement? Counterclockwise • How long does it take? 365 days/1 year • What is the rate? 100,000km/hr • Results of motion? Seasons with the Earth’s tilt and orbital speed • How can you prove this motion? Changing constellations and parallax

9. Changing constellations and parallax Animations MotionParallax Animation Constellations animation

10. EXIT: • Complete questions 1 and 2 on your note packet page 5. Be prepared to discuss.

11. Earth Motions Astronomy Page 4

12. SWBAT: Define rotation and revolution and provide proof for both motions.

13. Open packets to pg 4 • Do Now: Quick Write. Take about 3 minutes to write the difference between the revolution and rotation of the earth. Write down what comes to mind what these motions cause etc. Be prepared to share your quick write with the class.

14. Earth's Motions How long is one rotation of Earth? One day How long is one revolution of Earth? One year

15. Rising and Setting of the Sun Rising and Setting of the Moon Rotation Movement of Stars through the sky The Seasons Changing Constellations Revolution

16. How do you calculate Earth's rate of rotation? One rotation = 360° Time for one rotation = 24 hours 360° ÷ 24 = 15°/hr

17. How many degrees did the stars move from diagram 1 to diagram 2? 30° (2 hours x 15°)

18. It’s the only one that didn’t move How can you find Polaris?

19. Northern Because Polaris can only been seen in the North What hemisphere must you be in? Why?

20. What direction must you be looking? North

21. What direction do the stars appear to move?

22. What causes the stars appear to move?

23. Evidence for Rotation Foucault Pendulum Coriolis Effect

24. Evidence for Revolution Changing Constellations Parallax

25. EXIT: • On your index card describe why we can’t see the same constellations all year long.