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Across 1. Example of physical change from liquid to solid: ________ forms in the freezer. 5. The action of heating a liquid until it becomes a vapor. 9. When a liquid changes to a vapor, caused by an increase in temperature and/or a decrease in pressure. 10. The action of changing from a solid to a liquid as the temperature is raised. 12. A substance like air that is neither liquid nor solid, for example oxygen or hydrogen. 14. The process or instance that changes or causes to change directly from a solid to a vapor or gas without first melting. 15. A substance that stays the same shape whether it is in a container or not.

Down 2. The action of turning a vapor into a liquid by contact with a cool surface. 3. Example of physical change from solid to gas: Dry ice turning into carbon dioxide ______. 4. The process in which something changes from liquid to solid as the temperature becomes lower. 6. When something becomes different. 7. Example of physical change from gas to liquid: ________ of the water form on a glass holding a cold drink. 8. The structure, the form, or the constitution of something. 11. A substance which is not solid but which flows, for example water. 13. Example of physical change from solid to liquid: Ice _________. 16. Example of physical change from liquid to gas: Clothes _______,