1. Environmental Science Test 2 Review Across 6. Exotic 10. Renewable 14. Succession 17. Carnivore 20. Dispersal 22. Climate 23. Food chain 26. Energy pyramid 30. Biodiversity 31. Biogeography 34. Herbivore

2. Environmental Science Test 2 Review Down 1. scavenger 2. omnivore 3. water cycle 4. pollution 5. nonrenewable 7. threatened 8. nodules 9. keystone 11. pioneer 12. extinction 13. invasive 15. native 16. consumer 18. producer 19. primary 21. secondary 24. captive 25. fixation 27. decomposer 28. food web

3. 29. Drift 32. Endangered 33. Poaching 1.Mosses and lichens 2.Sunlight, wood, water 3.Oil, coal, copper 4.Yellowstone National Park 5.Philadelphia Zoo 6.Secondary because they have an established ecosystem that went through some type of disturbance. 7.Water, noise, air 8.Environmental science 9.Grass, shrubs 10.Snake, owl 11.Grass prairie dog snake