Across
- 3. An area where water drains
- 4. Series of overlapping food chains
- 7. all living organisms on earth
- 9. Groups of populations that interact with each other in a given area
- 11. Both species benefits
- 12. Non-living things in the environment
- 17. All the members of one species that live together
- 18. all the water on earth
- 20. when species within an ecosystem compete for the same resources
- 21. Study of the oceans
- 23. Lives on land
Down
- 1. Current in the ocean that brings deep, cold water to the surface containing high concentrations of nutrients
- 2. The measure of the amount of solid or salt dissolved in seawater
- 5. An area of the land that water drain into
- 6. How water is circulated on earth
- 8. An interaction between species in with predators eat prey
- 10. Living things within the environment
- 13. Lives in water
- 14. One organism gets the benefits at the others expense on them
- 15. One species benefits and the other species is neither harmed nor benefitted
- 16. Mainly bacteria and fungi, consumers that use waste and dead organisms for food
- 19. All gases surrounding earth
- 22. Role and position a species has in it environment