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Across 1. the number of different kinds of plants and animals in specific area 5. a species not native to a specific location which has a tendency to spread to a degree believed to cause damage to the environment 7. non-living parts of the environment 8. animals that eat plants(herbivores) 9. a change in the particular environment where organisms tend to live 10. portion of the Earth's surface made of water 11. the line of dependence among members of a population 15. animals that prey on secondary consumer 18. a species living outside its native distributional range, which arrive there by human activity either deliberate or accidental 21. water 22. the part of the Earth where life can exist 23. the part of the Earth that is comprised of the crust and the upper part of the mantle 24. the interaction and dependence of food chains on one another 25. a region of the Earth's crust classified according to factors such as temperature and plant and animal life 26. describes differences between organisms

Down 2. animals that eat other animals (carnivores) or both plants and animals (omnivore) 3. make less severe, serious or painful 4. living things in the environment 6. a natural feature of Earth's surface 12. land 13. organisms such as fungi, bacteria that bresk down dead plant and animal material into nutients 14. where two species exist together and at least one of the species benefits from teh interaction 16. to harvest to much especially at an unsustainably high level 17. mainly green plants that use the sun's energy to produce food 19. the layers of air that surround the Earth's surface 20. a community of interacting organisms