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

Across 3. The thickness or resistance to flow. 4. How matter is inside something. 5. Neutrally charged particles. 7. How much mass is in a certain volume of matter. 8. Man-made elements 10. Positively charged particles. 12. The amount of protons in a atom. 14. A substance that is free to flow, with no particular shape. 16. When a gas becomes a liquid. 17. When water molecules have special bonds that hold them together. 18. When atoms begin moving until they need more room then the small pan. 20. Anything that has a specific shape and size. 22. The ability of something to float. 25. When something changes from liquid to gas. 26. Anything that volume and mass. 27. A solid without a shape. 28. The center of an atom. 29. When atoms join or move away from each other.

Down 1. A liquid that doesn't behave like other liquids. 2. Oppositely charged particles. 4. The number of nucleons an atom has. 6. The temperature that makes a liquid turn into a solid. 9. An electron assigned to a particular energy level. 11. Elements that are found in nature. 13. Is when ice turns into liquid water. 15. The amount of space something takes up. 19. Another word for both protons and neutrons. 21. A state of matter that doesn't have a specific volume or shape. 23. The smallest particle of an element that still keeps the properties of that element. 24. When water atoms go crazy with all kinds of energy.