Across
- 5. the most amount of photosynthetic activity takes place here
- 8. wetlands that are called wooded wetlands
- 12. 78% of the atmosphere is made of this
- 13. trees that grow in salt water
- 15. habitat located in warm, sandy areas near coral reefs
- 17. called a biological desert due to its low productivity
- 18. islands that are parallel to coastlines
- 22. the way water moves through the environment
- 23. caused by higher water temperatures
- 25. where rivers meet the sea
Down
- 1. deep ocean organisms rely on this for nutrients
- 2. low levels of this can affect plant growth
- 3. wetlands that don't have trees
- 4. the layer of ocean that is sunlit
- 6. lies below the oceans crust and heats thermal vents
- 7. one of the types of nitrogen compounds that can be used by plants
- 9. places where carbon accumulates
- 10. the most productive estuary in America
- 11. when carbon dioxide is released
- 14. nutrient poor land that is similar to bogs
- 16. microscopic organisms that are free floating
- 19. what evaporates about 460,000 km of water every year
- 20. areas of saturated ground
- 21. shorelines are this type of zone
- 24. what cycle starts with the intake of carbon?
- 25. the only planet that provides an environment that supports life