Across
- 4. long term changes in weather patterns
- 6. gas, oil, coal, etc.
- 7. reaction where two atoms are combined releasing energy
- 9. breaking a law or rule
- 12. happens on clear nights; very cold mornings
- 13. high energy state of matter
- 16. harmful products put into the environment
- 19. most worrisome greenhouse gas
- 21. National Aeronautics and Space Administration
- 23. group of galaxies
- 24. study of marine organisms
Down
- 1. as the atmosphere gets thicker, less heat is released into space
- 2. is a gradual change in a species over time
- 3. oodorless gas from tailpipe
- 5. dealing in illegal substances (drugs, animals, humans)
- 8. study of the seas
- 10. science of domestic livestock
- 11. study of human life (genetics anatomy, etc.)
- 14. weather over a long period of time
- 15. when birds clean their feathers
- 17. measure distance in space
- 18. Bald and Golden Eagle Protection Act
- 20. warm or cold, wet or dry at one time
- 22. donut device used fusion