Physical Science

2. pressure, the pressure caused by the collisions f particles in a vapor with the walls of a container.
4. Zero, a temperature of 0 degrees Kelvin.
6. law, the direct proportion of volume of a gas to its temperature(in kelvin) if the pressure and the number of particles of gas are constant
8. a description of a change in which a system releases energy to its surroundings.
10. the state of matter in which a material has neither a definite shape nor a definite volume.
12. the phase change in which a substance changes from a liquid into a gas.
14. change, Change that occurs when a substance reacts and forms one or more new substances.
15. Property, any property that produces a change in the composition of matter.
17. the process that changes a substance from a liquid to a gas at temperature below that substance's boiling point.
18. a solid that forms and separates from a liquid mixture.
19. a description of a change in which a system absorbs energy from its surroundings.
20. of vaporization, the energy a substance must absorb to change from liquid to a gas.
21. Energy, the energy of an object has due to its motion.
22. the state of matter in which materials have a definite shape and a definite volume.

1. of Fusion, the energy a substance must absorb to change from a solid to a liquid.
3. the result of force distributed over an area.
5. a process that separates the substances in a solution based on their boiling points.
7. the state of matter in which materials have a definite volume but not a definite shape.
9. the property that describes how readily a substance combines chemically with other substances.
11. a materials ability to burn in the presence of oxygen.
13. the phase change in which a substance changes from a gas or vapor to
16. law, the inverse variation of the volume of gas with its pressure if the temperature and the number of particles is constant.
18. Change, a change that occurs when some properties of a material change, but the substance in the material stay the same.