Chapter 2 Terms
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Created by:
carlislesandy on January 15, 2010
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16 terms
Terms | Definitions |
|---|---|
 physical property | a characteristic of a substance that can be observed without changing the identity of the substance |
| melting | when a substance changes from its solid state to its liquid state. |
| density | a property of matter representing the mass per unit volume. |
| melting point | the temperature at which melting happens |
| chemical property | a characteristic of a substance that describes how it can form a new substance. |
| freezing | when a substance goes from its liquid state into its solid state. |
| physical change | a change in a substance that DOESN'T change the substance into a different one. |
| chemical change | a change of one substnace into another one |
| freezing point | the temperature at which a substnace changes from its liquid state to its solid state. |
| boiling point | the temperature at which something goes from its liquid state to its gas state. |
| evaporation | when a substnace goes from its liquid state to its gas state by random particle movement. usually occurs at the surface of a liquid over a wide range of temperatures. |
| condensation | when gas becomes a liquid |
| boiling | when a substances goes from its liquid state to its gas state. its heated to a certain temperature and bubbles of vapor form inside the liquid. |
| molecule | a group of atoms that are held together by covalent bonds so that they move as a single unit |
| states of matter | different forms in which matter can exist. solid, liquid, gas. |
| Formula for finding density. | mass divided by volume |
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