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Across 6. Level of ecology that is a combination of both the biotic and abiotic fators. 8. A regions in the world that has similar biotic and abiotic factors 11. All the various species (or biotic factors) in an ecosystem. (2wrds) 13. Tolerance zone where the biotic factors are not conducive to support a species. 14. Competition between members of the same species. 15. How many centiliters that are in one liter. 17. Land portion of the biosphere 19. The role a species within the environment. 22. Living factors of an ecosystem 24. Where all life exists 25. How high life can exist in the atmosphere. 26. Any biotic or abiotic factor that will affect population sizes. 28. Relationship where one organism huts and kills another primarily for food. 29. Biotic relationship were both species benefit from the interaction.

Down 1. All the members of the same species within an ecosystem 2. Factors in ecosystems that are not living 3. A set of abiotic factors that a species can survive in 4. Biotic relationship where one member benefits and the other is not affect. 5. Water portion of the biosphere 7. Biotic relationship between two species or individuals that both want a limited resource. 9. Air portion of the biosphere 10. Where an organism lives 12. Competition between 2 different species. 16. To convert from milligrams to grams you would ________ the number by 1000. 18. Biotic relationship where one species is benefited but the other is harmed. 20. The study of organisms and how the interact with the environment. 21. Organisms that interact with each other in an ecosystem. 23. Tolerance zone that is best for a species and population numbers. 27. How many millimeters are equal to 1 centimeter