1. What is the difference between rotation and revolution?
Practice your brain dump:
Rotation:
Revolution:

2. Rotation…Orbit…Revolution
What is the difference?

3. Rotation: The spin of a body on its axis.

4. Orbit: The path that a body follows around another body in space.

7. Rotation vs. Revolution

8. Axis: Imaginary line connecting the North and South Pole
Earth rotates COUNTERCLOCKWISE about its axis.

9. The Earth’s axis is tilted at 23.5 degrees
Earth’s tilt is why we experience
seasons!

11. Use the following words to complete the sentences.
Orbits
Revolution
Rotates
Axis
24 hours
365 days
The earth ______ on its _____ once every _______.
The earth ______ the sun once every _________to complete one __________.

12. NEWTON’S LAW OF UNIVERSAL GRAVITATION

13. NEWTON’S LAW OF UNIVERSAL GRAVITATION
Newton noted that an object falls towards the Earth because Earth and the object are attracted to each other by gravity.

15. What Causes Day and Night?

16. The Earth rotates on its axis counterclockwise

17. The rotation of the Earth causes all parts of the Earth to experience periods of daylight and darkness.

18. Rotation causes the Earth to have day and night.

19. At any moment, 50% of the earth is experiencing daylight, the other 50% is experiencing night time.

20. The number of hours of daylight and the intensity of the sunlight a place receives:
vary in a predictable pattern
depend on how far north or south of the equator the place is.

21. The earth’s axis is tilted at 23.5 degrees.

22. The earth’s axial tilt is the reason the Earth experiences changing seasons.

24. Equinox- The time when the sun is directly above the equator.
Both hemispheres receive the same amount of sun .
Daytime hours = Night time hours

25. Solstices: When the sun is furthest north or south of the equator.
Equinoxes
Vernal Equinox: March 20
Autumnal Equinox (Autumn): September 21 or 22
Summer Solstice: June 21 or 22 - Longest day of the year
Winter Solstice: December 21 or 22 - Shortest day of the year

26. In June, the Northern Hemisphere is tilted toward the sun, so it is warmer there than the Southern Hemisphere.
In December, the Northern Hemisphere is tilted away from the sun, so it is cooler there than the Southern Hemisphere.

29. Video Clips What Causes the Seasons (2:16)
Bill Nye Explains Seasons (4:45)
What Makes Day and Night Song (2:16)

30. Journal Work
Describe what this diagram shows us, using as many of our current vocabulary words as you can.

31. All about Earth’s MOON!

32. The moon is a natural satellite.
A satellite is a moon or machine that orbits a planet or star.

33. Earth has only one moon.

34. The moon is about 240,000 miles from Earth.

36. Photo taken of Earth and our moon from 114 million miles away!

37. The Earth’s moon revolves around the Earth as both go through space and revolve around the Sun.

38. Movements of the Moon Revolution – Moon orbits Earth every 27.3 days
Rotation – Moon turns on its axis every 27.3 days

39. Movements of the Moon
Because the rotational period is equal to its period of revolution around the Earth, we always see the same side of the moon (from Earth)!

40. Exploring the Moon 1950s to 1960s – probes sent
Neil Armstrong First man on the Moon – July 20, 1969
Six Apollo missions ( )
12 Americans have walked on the moon