click below
click below
Normal Size Small Size show me how
Science Sec.1-1Vocab
Question | Answer |
---|---|
characteristic property | A quality of a substance that never changes and can be used to identify the substance |
boiling point | The temperature at which a substance changes from a liquid to a gas |
melting point | The temperature at which a substance changes from a solid to a liquid |
physical change | A change in a substance that only involves a change of state, and not a change in identity |
chemical change | A change in which one or more substances combine or break apart to form new substances with new properties. |
chemical activity | The characteristic property of a substance that indicates its ability to undergo a specific chemical change |
mixture | Two or more substances that are physically mixed together but do not chemically combine |
solution | A very well mixed mixture, usually a liquid and usually transparent (i.e.salt water) |
pure substance | A substance made of only one kind of matter and having definite properties, such as elements or compounds. |
element | A substance that can't be broken down into other substances by chemical or physical means |
compound | A substance made up of two or more elements which are chemically combined |