Across
- 4. process in which matter and nutrients slowly build over water
- 7. low average temperature and more percipitation then tundra
- 10. evergreens that are made of needles
- 14. combustion,decomposition,fossil fuels
- 17. resources of an ecosystem
- 18. states that energy cant be destroyed or created
- 22. everything that has mass
- 23. very dry less than 10 inches of rain
- 24. evaporation,transpiration,respiration
Down
- 1. has many grasses and few trees
- 2. a region of earth where the climate determines the type of plants that live there
- 3. lichen,moss,and other things that grow on rocks.
- 5. broadleefed trees
- 6. states that mass can't be destroyed or created.
- 8. the ability to do work and enables organisms to use matter and energy from their environment.
- 9. human growth
- 11. when rocks become ecosystems
- 12. the protection and wise use of natural resources
- 13. enclosed body of water where the river flows into the ocean
- 15. a tool that can be used to trace the flow of energy though an ecosystem
- 16. the number and variety of species
- 19. area of land that is saturated for part of the year
- 20. most of earth's atmosphere
- 21. low average temperature and very little percipitation.