Chapter 2&3 vocab

3. the process that changes a substance from a liquid to a gas at temperatures below the substance’s boiling point
5. the phase change in which a gas changes directly into a solid without first changing into a liquid
6. a type of mixture in which the substances are evenly distributed and it looks like a single substance
9. a heterogeneous mixture that separates into layers over time
13. a material’s ability to burn in the presence of oxygen
15. a substance that cannot be broken down into simpler substances
16. a material’s ability to allow heat or electric charges to flow
17. a homogeneous mixture that is opaque
19. any characteristic of a material that can be observed or measured without changing the composition of the substance
20. a substance that is made from two or more simpler substances that are chemically combined in a specific ratio
23. the ability to produce a change in the composition of matter
25. the smallest particle of an element
26. the state of matter that has neither a definite shape nor a definite volume
27. a process that separates materials based on the size of their particles

1. matter that always has exactly the same composition; an element or compound
2. the phase change in which a substance changes from a solid directly to a gas without changing to a liquid first
3. a change in which a system releases energy to its surroundings
4. a type of mixture in which the substances are evenly distributed and it looks like a single substance
7. a change in which a system absorbs energy from its surroundings
8. the phase change from a gas to a liquid
10. a reversible physical change that occurs when a substance changes from one state of matter to another
11. change that occurs when a substance reacts and forms one or more new substances
12. a change that occurs when some properties of a material change, but the substances in the material stay the same
14. a homogeneous mixture that is transparent and forms when substances dissolve
18. the state of matter in that has a definite volume but not a definite shape
21. the phase change in which a substance changes from a liquid into a gas or vapor
22. the ability of a solid to be flattened without shattering
24. the state of matter that has a definite shape and definite volume