Chapter 8 Crossword
Across
- 1. The political boundary that separates North and South America
- 5. The primary reference line for latitude
- 7. Everything is made up of this
- 9. The first type of organism on Earth
- 10. Something that continues to this day
- 12. The event that caused it to rain on Earth
- 14. A super nova exploding
- 16. the color that penetrates ocean water the deepest
- 18. Second largest ocean
- 19. Smallest major land mass
- 26. The accretion period lasted this many million years
- 28. What makes a star shine
- 29. Stars are massive spheres of this
- 31. Our galaxy
- 32. The origin of life on earth came from here
- 35. The universe’s beginning
- 37. This made heavy rains fall
Down
- 1. Largest ocean
- 2. Bordered by the Atlantic Ocean to the west, the Indian Ocean to the east, and the Mediterranean sea to the North
- 3. This formed around 4.6 billion years ago
- 4. A collapsing star
- 5. Single continuous land mass that includes Europe and Asia
- 6. Another name for latitude
- 8. Protects us from UV rays
- 11. Includes the United States, Mexico,& Canada
- 13. Includes all countries south of panama
- 15. 10% of the earth is covered with this
- 17. Iron sinking to the middle of a planet and lighter minerals migrate to the surface forming the crust
- 20. The Elements most abundant after the Big Bang
- 21. Provides tides in the ocean
- 22. The reason water is liquid on Earth
- 23. The Big Bang is thought to have occurred this many years ago
- 24. How stars and planets were formed
- 25. The last stage of evolution of a star before a super nova
- 27. General shape of the Earth
- 30. Heavy rains fell for this many years
- 33. Continent of the south pole
- 34. The early atmosphere contained ammonia, carbon dioxide, water vapor, other gasses, and also this
- 36. The primary reference line for longitude