Across
- 5. A small body of matter that enters into the Earth's atmosphere
- 8. Water boils at 100 degrees in this scale
- 10. The study of living things
- 14. an event in which the shadow of one celestial body falls on another
- 15. The distance that light travels in one year
- 16. The gases surrounding the Earth or a planet
- 21. The place where everything gets it's energy
- 22. The galaxy in which the Sun and solar system
- 23. The amount of compactness in a substance
- 24. A process used by plants and other organisms
- 26. The amount of heat of coldness in the air
- 29. Interlocking food chains
- 30. The state of the atmosphere at a place and time as regards rain, heat, wind, sunshine, etc.
Down
- 1. A cold dry biome that has very little plant life and the animal called the Caribou lives there
- 2. A collection of stars, dust, and gas bound together by gravity
- 3. A dwarf planet that used to be part of the solar system
- 4. A large cloud of gas and dust where stars are born
- 6. The study of animals
- 7. an organism that only eats plants
- 9. An animal that feeds on dead organisms
- 11. The largest planet
- 12. All of space, including galaxies, solar systems, planets, and stars
- 13. An instrument that measures air pressure
- 17. The gravitationally bound system, including a sun with planets orbiting it
- 18. The study of an organisms habitat or ecosystem
- 19. The energy of an objects motion
- 20. A small very dense star, usually the size of a planet
- 25. A natural body that revolves around a planet
- 27. A very large star, that is late in it's life cycle
- 28. A small body of ice and cosmic dust that gives off gas and dust in the form of a tail