Across
- 2. is farther from the shore where there are no rooted plants
- 4. trees that lose their leaves and stop photosynthesis during part of the year
- 6. is the organic matter, or biomass, that remains after cellular respiration
- 9. the very bottom of a body of water
- 14. some animals enter a deep, sleeplike period of dormancy when conditions are dry
- 16. measures the amount of salts dissolved in the water
- 18. the vertical flow of cold, nutrient-rich water toward the surface, occurs where horizontal currents diverge, or flow away from on another
- 20. underground soil remains frozen year-round
- 21. the uppermost layer of an aquatic ecosystem where there is enough sunlight for photosynthesis
Down
- 1. evergreen species of trees that produce see-bearing cones
- 3. a deep, sleeplike state that an animal enters for most of the winter
- 5. are areas of land that are flooded with water at least part of the year
- 7. areas nearest a river's course that are flooded periodically
- 8. describes the average conditions, including temperature and precipitation, over long periods in a given area
- 10. bodies of water, partly enclosed by land, they occur where fresh water from land drainage meets the water of an ocean or inland sea
- 11. describe the conditions in a biome
- 12. the shallow near-shore portion of the photic zone
- 13. tall trees form a dense covering
- 15. where no sunlight penetrates and photosynthesis cannot occur
- 17. are always primarily defined by their climate and typical plant and animal life
- 18. shorter trees and plants that compete for available light
- 19. day-to-day conditions in Earth's atmosphere