Across
- 2. what general shape is the earth
- 5. how long did the accretion last
- 6. what is our galaxy name
- 8. includes united states Canada and Mexico
- 10. lines are also known as
- 12. what color can penetrate the ocean waters the deepest
- 14. how old are the oldest fossils
- 17. early steps of organisms forming organic building blocks
- 18. what does gravity hold together
- 19. what ocean is the largest
- 20. who experience with atmosphere gases
- 22. what planets formed through
- 24. how much land is covered in ice
- 25. the name of the continent of the south pole
- 26. which land is the smallest
- 27. what chemical element made the planets, stars, oceans
- 29. which ocean is the warmest
- 30. the northern ocean
Down
- 1. at what angle is the earth's axis tilted
- 3. the reference line drawn around the earth that connect the prime meridian
- 4. the star collapse explosion
- 7. who suggest that heat from the thermal vents in the sea
- 9. when was the earth form
- 11. what polItical boundary that separates north and south America
- 13. one of the galaxy shapes
- 15. why stars shine
- 16. how many galaxies are there
- 21. how much of the earth is water
- 23. what ocean connects the polar waters
- 28. when the stars energy rises and the star swells up