Physical Science Vocab 2

1. anything about a substance that can be observed or measured without altering the substance´s chemical composition
4. solid frost formed directly from a vapor
8. a mixture that has a uniform appearance throughout; also known as a solution, especially of a solid dissolved in a liquid
9. change in matter that does alter the chemical composition of a substance
10. the temperature of which a solid turns to a liquid
14. a pure substance consisting of atoms of two or more different elements that are chemically combined
15. the state of matter in which particles are far apart, move rapidly, and have little interaction with eachother
18. the measure of gravity acting on the matter in an object
19. the law that states that the masses of chemical substances combine in definite, characteristics integer ratios when forming compounds
21. the change of state from a liquid to a vapor
24. a gas-like state of matter, formed at very high tempatures, that consist of high-energy ions and free electrons
25. the relatively fast form of vaporization
26. states all physical matter exists in the form of particles in constant motion
28. states that matter can neither be created nor destroyed, but can only change forms
30. the amount of matter in an object
32. the state of matter in which particles are close together but able to move around

2. a mixture that does not have a uniform appearance since the combined substances are unevenly distributed
3. the change of state from a liquid to a solid
5. when a solid goes directly to a vapor without melting first
6. the temperature at which the liquid starts to boil
7. a pure substance that consists of atoms with the same atomic number
11. the relatively slow form of vaporization in which particles on the surface of the liquid state obtain sufficient energy to change to the gaseous state through the random collisions of particles
12. a material made of only one kind of element or compound; it is not a mixture
13. the change of state from solid to liquid
16. describes how a substance changes in the presence of another substance or under certain conditions
17. a physical combination of two or more substances in a changeable ratio
20. change in matter that does not alter the composition of a substance
21. the space enclosed or occupied by an object
22. the change of states from a vapor to a liquid
23. anything that occupies space and has mass
27. the mass of matter contained within a particular volume
29. building block of all matter
31. the state of matter in which particles vibrate in fixed positions, giving a substance a fixed shape and volume