Across
- 3. A type of feedback loop where the change decreases each cycle
- 4. Used to measure distances outside of our solar system
- 6. A single, identifiable source of pollution
- 9. The incorrect idea that the Earth is in the middle of our solar system
- 10. an underground store of water
- 11. What is created at the end of a supermassive stars life
- 13. The start of the universe
- 18. The name of our galaxy
- 21. not depleted when used
- 22. A star and everything that orbits it
- 23. liquid or solid water falling to the ground
- 24. Astronomer who discovered 3 laws about planetary orbits
Down
- 1. the introduction of a substance into the environment
- 2. an area of land where water flows to the same endpoint
- 5. A type of feedback loop where the change grows each cycle
- 7. phase change from liquid to gas, through plants
- 8. A major piece of evidence for the Big Bang Theory
- 12. Used to measure distances in our solar system
- 14. The shape of orbits
- 15. The correct idea that the sun is at the center of our solar system
- 16. Phase change from a liquid to a gas
- 17. The most abundant element in our solar system
- 19. Phase change from gas to liquid
- 20. A system in which the systems output later becomes the input