Across
- 2. What general shape is the earth
- 6. What had a beginning?
- 8. What are the smallest types of organisms found in the ocean?
- 10. What aggregations of gas and dust which may be several hundred kilometers in diameter.
- 13. Whos experiment was in 1953
- 16. What planet is believed to have once had a magnetic field that dissappeared when the planet's iron core cooled?
- 18. what type of layer protects us from UV
- 19. what is the largest ocean basin
- 22. What ocean has Eurasia as its northern boundary and Africa as its western boundary
- 23. massive spheres of what?
- 24. Every chemical element that made the planets, stars, oceans, and organisms is made up of what?
- 27. Distance from the sun allows for what?
- 29. What occurred everywhere and caused massive clouds in upper atmosphere
- 30. Our galaxy is the spiraled what?
Down
- 1. What are scientists able to calculate from the radioactive elements found in a meteorite that decay at a particular rate?
- 3. what type of force is right
- 4. What object was used to chart the direction of surface currents
- 5. What is the continent at the south pole
- 7. Iron sunk to the middle of the planet?
- 9. Lines of latitude are also known as what?
- 11. What provide for gentle tides?
- 12. As the star converts more H into heavier elements the energy outpust rises and the body of the star swells into a?
- 14. What is the continent border to the north by the Mediterranean
- 15. What type of object can give us information about the conditions in which the solid planets?
- 17. what is the smallest ocean basin
- 20. What color ocean can penetrate the ocean waters the deepest
- 21. What theory were stars and planets formed
- 25. The sun is a what?
- 26. What ocean extends from Antarctica to the Arctic ocean basin
- 28. What is the primary reference line of latitude?