2. Welcome to... A Game of X’s and O’s

3. Modified from a game Developed by Presentation © 2000 - All rights Reserved markedamon@hotmail.com

4. 789 456 123

5. 789 456 123 Scoreboard X O Click Here if X Wins Click Here if O Wins

6. 1 How long does it take the Earth to rotate once on its axis?

7. 1 1 Day or 24 hours Home

8. 2 What causes the day/night cycle on the Earth’s surface?

9. 2 The Earth’s rotation on its gravity

10. 3 Why does the sun appear to move across the sky every day?

11. 3 The Earth is rotating on its axis.

12. 4 What is the Earth’s only natural satellite?

13. 4 The moon

14. 5 About how long does it take the moon to go through all of its phases?

15. 5 About 1 month (27-29 days)

16. 6 What causes tides on the Earth’s surface?

17. 6 Gravity from the moon and the sun

18. 7 What causes the seasons on the Earth’s surface?

19. 7 The Earth’s tilt on its axis as it orbits the sun

20. 8 What is a year?

21. 8 A year is the length of time it takes a planet to orbit the sun.

22. 9 What is the difference between rotation and revolution?

23. 9 Rotation means to spin on an axis, while revolution means one object revolving around another.