1. Rotate or Revolve?
GLE Explain how the positional relationships among the earth, moon, and sun control the length of the day, lunar cycle, and year.

2. TNReady Practice Question

3. Answer
The correct answer is B.
The lunar cycle.
Lunar = Moon

4. Lesson Objective
At the end of the lesson you will understand the difference between rotate and revolve.

5. Question to Ponder
How does the Earth move?

6. Directions
Whenever you see this image, write the text in your science notebook.

7. Definitions
Rotate- to spin
Revolve- to go around another object or orbit

8. Pair Share
If you are an odd number (1,3,5) you will go first and tell your partner what it means to rotate.
If you are an even number (2,4,6) you will listen until your partner has finished, then you will share what it means to revolve.

9. Check for Understanding
Synonyms
Match 2 words together
Rotate
Revolve
Orbit
Spin

10. Answers
Synonyms
Rotate and Spin
Revolve and Orbit

11. Rotate
Think of the Earth rotating like a...
A child’s toy – A spinning top

12. Rotate
The Earth spins or rotates on its axis
Tilted at 23.5 Degrees

13. How Fast?
One
rotation
takes
24hrs

14. What happens when the Earth rotates?
What is the Result?
What happens when the Earth rotates?

15. Check for Understanding
A complete rotation of the Earth results in _________________________.

16. Answer
A complete rotation of the Earth results in day and night (24hrs).

17. Think of the Earth revolving like... Going around another object
Revolve
Think of the Earth revolving like...
Going around another object
A Traffic Round About

18. Revolve
The Earth revolves around its star.

19. How Fast?
Earth revolves around the sun in 365 days, 5 hours, 59 minutes and 16 seconds
The moon revolves around the Earth in 27.3 days

20. What is the Result?
What happens when the Earth revolves around the Sun?
What about the moon revolving around the Earth?

21. Check for Understanding
A complete revolution of the Earth around the Sun results in _____________.
A complete revolution of the Moon around the Earth results in _______________.

22. Answers
A complete revolution of the Earth around the Sun results in a year (365 days).
A complete revolution of the Moon around the Earth results in a month (28 days).

23. What objects revolve in space?
Satellites revolve around the Earth (GPS)
Space station revolves around the Earth
Moons revolve around their planets
Planets revolve around their star
The four gas planets have rings that revolve around them

24. Lesson Summary What is the definition of rotate?
Give an example of an object that rotates
What is the effect of the Earth rotating?
What is the definition of revolve?
Give an example of an object that revolves
What is the effect of the Earth revolving?

25. Question to Ponder
How does the Earth move?

26. Lesson Assessment Put notes away. Pencil only needed.
Label your slip of paper with your name, date, and block.
Label each statement as Rotate or Revolve