Chapter 7 & 8 Aquatic Crossword

123456789101112131415161718192021222324
Across
  1. 5. What is the primary reference line of latitude?
  2. 6. Ocean What ocean is the trade route between Africa & Asia?
  3. 8. What percentage of ice covers the total surface of earth?
  4. 9. When was Stanley millers experiment?
  5. 15. Lines of latitude are also known as _____
  6. 17. ____ of the oceans is covered in ice?
  7. 18. Water collected in ____ when the surface of the earth cooled
  8. 20. The continent of the south pole is ___?
  9. 22. Ocean What name do scientists give to earth when the outer surface was completely molten?
  10. 23. England What place does the primary reference line of longitude pass through?
  11. 24. How many major continental land areas are there?
Down
  1. 1. in How quickly is the moon moving away from the earth?
  2. 2. billion years How long ago were there at least islands of continental crust on earth?
  3. 3. The united nations established the boundaries of the oceans and continents when?
  4. 4. Which ocean connects the polar waters?
  5. 5. Hubble Who made the discovery that distant stars and galaxies are receding from the earth in all directions?
  6. 7. What is the smallest ocean?
  7. 10. What general shape does the earth have?
  8. 11. (Release of volatile substances and water vapor) occurred everywhere and caused massive clouds in upper atmosphere.
  9. 12. ____ of the land is covered In ice?
  10. 13. The earth is divided into time zones that are ____ degrees wide
  11. 14. What color can penetrate the ocean waters the deepest?
  12. 15. What is the largest ocean?
  13. 16. The ____ is a typical star?
  14. 19. Winds Earth’s iron core creates a magnetic field which protects a planet from?
  15. 20. What are scientists able to calculate from the radioactive elements found in a meterorite that decay at a particular time?
  16. 21. What planet is believed to have once has a magnetic field that disappeared when the planet iron core cooled?