Across
- 2. most abundant gas in the atmosphere
- 4. This demographic transition is marked by a steep population increase
- 6. A wetland habitat that has woody plants
- 11. This type of growth is unsustainable for long periods of time
- 13. when talking about evolution, it means how well you can survive and reproduce
- 14. An area defined by its climate and biological life
- 16. Fungi, bacteria and flies are examples of this
- 18. your permanent mark that you leave on the earth when you die
- 20. The study of human populations
- 21. This element is cycled through plants and animals and the atmosphere
- 22. The amount of people added to your country NOT by immigration
Down
- 1. These countries tend to have higher birth rates
- 3. A group of organisms in the same ecosystem that eat similar things
- 5. Land suitable for farming
- 7. A third level consumer
- 8. This is how clouds form and how your hot breath makes cold windows or mirrors foggy
- 9. A large flat cold treeless biome
- 10. This is the amount of a species that an ecosystem can support
- 12. How many different living things there are
- 15. the amount of energy that is transferred up each trophic level
- 17. The organisms that are responsible for getting energy into an ecosystem
- 19. A place where fresh and saltwater meet