Chapter 7 & 8 Crossword

3. Color that can penetrate the ocean water the deepest
4. distance measured by marine and air navigators
6. early steps of organisms forming from organic building blocks
7. massive spheres of incandescent gas
8. how stars and planets were formed
11. protects us from UV rays
14. largest ocean, 1/3 of Earth's surface
15. every chemical element that made the planets,stars,oceans, and organisms is made of this
16. iron sunk to the middle of the planet and lighter minerals migrated to the surface forming Earth's crust
19. deepest points on Earth
24. this is why stars shine
26. our galaxy is the spiraled
27. release of volatile substances and water vapor and cause massive clouds in upper atmosphere
28. cloud of cold dust and gas within a galaxy
29. where life arose
31. clumping smaller particles into larger masses
32. 4.5% is covered in ice

1. occurred 15 billion years ago and beginning of the universe
2. Smallest, coldest,and is also known as the Northern Sea
5. imaginary line running mostly along the 180 degree meridian
9. saltiest sea
10. the primary reference line drawn around the Earth that connects the poles
11. 5.5% is covered in ice
12. Continent of the South Pole
13. Edwin Hubble found that universe is still expanding
17. star's core will eventually collapse in an explosion
18. Primary reference line of latitude
20. type of motion an object floating in the water has
21. name of ancient super continent
22. lines of latitude
23. Ocean that connects the Polar waters
25. general shape of the Earth
30. political boundary separates North and South America