Across
- 2. warm, tropical forest, home to most of the world's life
- 3. cold, arctic, lots of pine trees
- 5. first word in a scientific name. Capitalized
- 6. blue, smelly gas
- 10. all earth's water
- 12. organism that makes its own food
- 13. second name in a scientific name
- 14. cH4
- 15. organism that eats others to sustain itself
- 16. the process of plants making their own food
Down
- 1. between two of the same species
- 4. the air
- 7. anything living
- 8. anything made of geological material
- 9. between two different species
- 11. hot dry climate. most animals are nocturnal here
- 12. rain that has a pH of 4.5 or under