Across
- 2. can corrode metals and cause harm to animals
- 4. element used on nuclear reactors
- 8. household wastewater
- 13. splitting of an atom to produce energy
- 15. can be replaced faster than used
- 16. flammable black liquid fossil fuel
- 19. converts radiant energy to electricity
- 20. pollution resulting from sunlight & car exhaust
- 21. poisonous, cancer causing, fire hazard
Down
- 1. largest # of individuals a area can have
- 3. any left over material from a reactor
- 5. cannot be replaced as fast as used
- 6. any substance that contaminates environment
- 7. formed from remains of ancient plants/animals
- 9. electricity produced from moving water
- 10. convert wind into electricity
- 11. Earth's heat to make electricity
- 12. fossil fuel found on top of oil
- 14. atomic nuclei are combined at high temps
- 17. one of the oldest sources of energy
- 18. clearing of forest for farming
- 19. all individuals of one species in an area