1. How do they measure gravity?


2. What happens with gravity as the elevation increases?


3. What is a tidal force?


4. What three factors affect tidal force?


5. Why is gravity less on the moon compared to Earth?


6. What is the moon’s effect on the bulges of Earth?


7. What happens about every six hours? Please include all names mentioned.


8. Generally, what do tides do to the ocean every day?


9. How does Earth’s spin affect the bulges?


10. What is Earth’s effect on the moon?


11. Why do we only see one face of the moon?


12. What is spring tide?


13. What is neap tide?