Across
- 2. what year did Stanley Miller conduct his experiment
- 4. stars give of what
- 8. our galaxy is known as what
- 9. how many years ago was The Big Bang
- 10. what protects us from UV rays
- 11. what is the process of planets forming
- 12. what process formed the first clouds
- 14. stars are made of
- 17. the first organisms on Earth were similar to
- 18. the Sun is classified as what
- 19. what is the name of the most advanced telescope used today
- 20. how many years was the accretion period
- 21. this can be compared to a spinning ice skater
- 22. what holds the planets in orbit
- 23. how many years from now until the sun will turn into a red giant
- 25. inner material is concentrated into a
Down
- 1. this is responsible for the formation of Earths gravitational field
- 2. how many years did the heavy rain fall
- 3. what type of element sank to earths core
- 5. what is it called when a star explodes
- 6. what is the name of our planet
- 7. earths iron core creates a magnetic field which protects the planet from
- 13. what shrinks under weak gravity
- 15. sent an electrical charge through a flask of a chemical solution of methane, ammonia, hydrogen and water
- 16. what type of object can give us information about the conditions in which planes are formed
- 24. what provides us with tides