Unit 2 Matter

2. a combination of two or more substances that are not chemically combined
3. the temperature and pressure at which a solid becomes a liquid
7. the change of a substance from a solid to a gas
10. state of matter that does not have a definite shape or volume
14. A mixture in which different materials can be distinguished easily
17. a combination of chemical symbols and numbers to represent a substance
18. a substance that cannot be separated or broken down into simpler substancesby chemical means; all atoms of an element have the same atomic number
20. a change from one state (solid or liquid or gas) to another without a change in chemical composition
21. a state of matter having definite shape and volume
22. a substance made up of atoms of two or more different elements
24. the temperature at which a liquid becomes a gas
25. the process of liquid changing state into gas
26. A change of state from gas to solid
29. the process whereby heat changes something from a solid to a liquid
30. separation of a homogeneous mixture by evaporation of a liquid or by using an ice water bath
31. the smallest unit of an element that maintains the properties of that element

1. a sample of matter; either a single element or a single compound, that has definite chemical and physical properties
4. a fundamental principle that matter cannot be created or destroyed
5. a change in which energy is given off (feels hot)
6. a change in which energy is absorbed (feels cold)
8. the change of state from a liquid to a solid
9. a property used to characterize materials in reactions that change their identity
11. a mixture in which substances are evenly distributed throughout the mixture
12. the degree of hotness or coldness of a body or environment (corresponding to its kinetic energy)
13. the process of a material becoming incorporated uniformly into another, or of two materials mixing together evenly
15. method of separating a mixture of liquid and solid using filter paper
16. the process of changing from a gaseous to a liquid state
19. a characteristic of a substance that does not involve a chemical change, such as density, color, or hardness
22. process that separates compounds in a homogeneous liquid using mobile and stationary phases
23. a state of matter having no definite shape but a definite volume
27. method of separating a mixture using different boiling points
28. the smallest unit of a substance that keeps all of the physical and chemical properties of that substance
29. anything that has mass and takes up space