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 1. A community of organisms and the environment 5. A mixture that has the same composition throughout because its parts are mixed evenly. 8. The real world limit on the solution you are designing, for example, safety, time, money, materials. 9. A group of food chains that overlap. 11. The temperature at which matter changes from a solid to a liquid. 13. The desirable features of a solution. 14. The role that a plant or animal plays in a habitat. 17. An animal that hunts, catches, and eats other animals. 18. An animal the feeds on dead plants and animals. 20. The point at which matter changes from a liquid to a gas. 24. Animals that are caught and eaten by predators 27. Change in one or more substance, caused by a reaction, that forms new and different substances. 29. The process of moving sediment from on place to the other. 30. A combination of two or more different substances in which the substances keep their identities. 31. The temperature at which matter is changed from a liquid to a solid. 32. The process of cutting down trees to plant crops. 33. A law that states that matter cannot be made or destroyed; however, matter can change into a new form.

Down 2. A living thing that cannot make its own food and must eat other living things. 3. All of the living and nonliving things that surround and affect an organism. 4. The place where an organism lives and can find everything it needs to survive. 6. Collecting as many ideas as you can, however good you think they are. 7. Anything that takes up space. 10. A change in which the shape or form of the substance changes, but the substance still has the same chemical makeup. 12. The process that plants use to make sugar. 15. Anything that you can observe about an object by using one or more of your senses. 16. The transfer of food energy between organisms in an ecosystem. 19. A living thing that gets energy by breaking down dead organisms and animal wastes into simpler substance. 21. A living thing, such as a plant, that can make its own food. 22. Organism that is non-native to the environment the disrupts the stable web of life. 23. The process of giving up one quality or feature of a design to gain a different quality of feature. 25. A diagram that shows that energy is lost at each level in a food chain. 26. All the organisms of the same kind that live together in a given area. 28. A group of organisms that live in the same area and interact with one another.