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Across 4. incorporates observations, hypothesis, experiments, theories, and laws (2 Words) 6. simplest form of matter that can exist under lab conditions 7. a substance that although is in the gaseous state, it's generally a solid or liquid at room temperature 9. each layer in a heterogenous mixture 11. does not have uniform composition; distinct layers are visible 14. the study of composition of matter and the changes that matter undergo 15. a quality or condition of a substance that can be measured without changing the chemical composition of the substance (2 Words) 18. liquid to solid 19. liquid to gas 20. made of two or more elements; can only be separated by chemical reactions

Down 1. consists of a physical blend of two or more substances 2. separates a homogeneous mixture into its component substances based on difference of boiling points 3. describes the changes that occur in a material when it becomes a new substance via chemical reaction (2 Words) 4. has a definite shape and volume 5. has uniform composition 8. the boundary between each phase 10. gas to liquid 12. solid to gas 13. solid to liquid 16. has a definite volume but takes the shape of the container in which it is held 17. expands to fill space