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34 Cards in this Set
- Front
- Back
Matter |
anything that has mass and takes up space |
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Chemistry |
the study of matter and how it changes |
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Substance |
a single kind of matter that is pure. |
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Physical Property |
a characteristic of a substance that can be observed without changing it into another substance. |
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Chemical Property |
a characteristic of a substance that describes its ability to change into different substances. |
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Element |
A pure substance that cannot be broken down into other substances by chemical or physical means. |
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Atom |
The basic particle from which all elements are made. |
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Chemical Bond |
The force that holds two atoms together. |
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Molecule |
A particle made of two or more atoms bonded together. |
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Compound |
A pure substance made of two or more elements chemically combined. |
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Chemical Formula |
A formula that gives the elements in a compound and the ratio of atoms. |
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Heterogenes Mixture |
A mixture in which pure substances are unevenly distributed throughout the mixture. |
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Homogenes Mixture |
A mixture in which substance are evenly distributed throughout the mixture. |
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Solution |
An example of a homogenous mixture; forms when substances dissolve. |
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Mixture |
Two or more substance that are mixed together but not chemically combined. |
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Weight |
A measure of the force of gravity on an object. |
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Mass |
A measure of how much matter is in an object |
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International System of Units |
The systems of units SI used by scientist to measure the properties of matter. |
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Volume |
The amount of space that matter occupies. |
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Density
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The measurement of how much mass of a substance is contained in a given volume. |
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Phisycal Change |
A change in a substance that does not change its idenity. |
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Chemical Change |
A change in which one or moresubstances combine or break apart to form new substances. |
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Law of conversation of mass |
The princeple that the total amount of matter is neither created nor destroyed during any chemical or physical change. |
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Energy |
The ability to do work or cause change. |
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Tempature |
A measure of the average motion of the particles of a substance. |
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Thermal Energy |
The total energy of all the particles in a object. |
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Endothermiic Change |
A change in which energy is taken in. |
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Exothermic Change |
A change in which energy is given of. |
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Kinetic Energy |
The energy of matter in motion. |
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Chemical Energy |
A form of potential energy that is stored in chemical bonds between atoms. |
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Electromagnetic Energy |
A form of energy that travels through space as waves. |
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Eletrical Energy |
The energy of electrically charged particles moving from one place to another. |
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Electrode |
A metal strip that conducts electricity. |
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Potential Energy |
The energy an object has because of its Position; Also the internal stored energy of an object, such as energy stored in chemical bonds. |