1
				2															3
																4
	5																		6					7
												8
						9
										10		11												12
	13
				14						15											16
17
																							18
	19							20								21
			22		23
															24
25
																					26
																	27
															28
						29
30
					31			32
	33

Across 3. These organisms get their energy from another organism without killing the organism. 5. ____ factors are nonliving things. 8. The gas that plants need to undergo photosynthesis. 10. These organisms feed on or break down dead plants and animals. 12. The word "synthesis" means to _____ 14. This is also known as light energy from the sun. 16. What structure of the plant is the location where photosynthesis takes place? 17. All food chains and food webs begin with the ____ 18. This is an animal that is hunted. 19. A meat and plant eater. 21. This is a place where an organism lives in an ecosystem. 24. Producers occupy the ____ trophic level because they have the most energy. 25. This pigment is responsible for why plants are green. 27. This is the chemical formula for glucose. 28. This is the chemical formula for water. 30. This is another name for a producer. 31. The word "photo" means ____ 33. The gas that humans breathe and is a by-product of photosynthesis.

Down 1. A meat-eater. 2. This is another name for an autotroph. 4. The process that plants go through to make food (glucose). 6. This is the smallest sustaining habitat where organisms live. 7. A plant-eater. 9. This is an animal that hunts another animal for food. 11. These are organisms that cannot make their own food. 13. This is the name of the food or sugar that plants make. 15. This is the position an organism occupies in a food chain. 20. This is a place where organisms interact with each other and their environment. 22. This shows the linear transfer of energy through the process of feeding. 23. When food chains combine they make a _____ 25. This is the organelle responsible for photosynthesis. 26. The element symbol of oxygen. 27. This is the chemical formula for carbon dioxide. 29. ____ factors are living or once living organisms. 32. This is the organism that parasites live in or on the surface of.