Across
- 2. What is the warmest ocean ?
- 6. Was is the name of the small early planets, which formed through gravitational attraction reaching the sizes of a few miles to eventually the size of our moon?
- 7. What is the first largest ocean?
- 10. Why do stars twinkle?
- 12. What is the smallest ocean?
- 14. What are scientists able to calculate from the radioactive elements found in a meteorite that decay at a particular rate?
Down
- 1. When the Earth first formed(at midnight on our 24-hour clock of Earth's history), how was the Earth like?
- 3. What is the second largest ocean?
- 4. What type of object can give us information about the conditions in which the solid planets formed?
- 5. Earth's iron core creates a magnetic field which protects the planet from ?
- 8. What speacial kind of water do scientists look at in the ocean and in comets to see if the proportions match?
- 9. What name do scientist give to Earth when the outer surface was completely molten?
- 11. Was the moon closer or farther when the Earth was younger?
- 13. What planet is believed to have once had a magnetic field that disappeared when the planets iron core cooled?