3. How do scientists explore the oceans
5. What does the ocean floor look like
6. Why are the oceans important
9. What are some properties of air
11. What are the layers of the atmosphere
12. How does the sun heat the atmosphere
14. What makes air pressure change
18. What are valley and mountain breezes
21. How do we measure relative humidity
25. How do snow, sleet, and hail form
27. What happens when air masses meet
28. What are some other kinds of fronts
29. What are thunderstorms, hurricains, and tornadoes