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Sci. Chapter 2 Vocab
Science Chapter 2 vocab
| Question | Answer |
|---|---|
| physical property | a characteristic of a pure substance that can be observed without changing it into another substance |
| volume | the amount of space that matter occupies |
| mass | a measure of how much matter is in an object |
| density | the ratio of the mass of a substance to its volume |
| endothermic | a change in which energy is taken in |
| exothermic | a change in which energy is given off |
| atom | the basic particle from which all elements are made |
| molecule | a neutral particle made of two or more atoms joined by covalent bonds |
| kinetic energy | energy of an object has due to its motion |
| potential energy | stored energy that results from the position or shape of an object |
| element | a pure substance that cannot be broken down into other substances by chemical or physical means |
| compound | a pure substance made of two or more elements chemically combined |
| homogeneous | a mixture in which pure substances are evenly distributed throughout the mixture, ex. whipped cream |
| heterogeneous | a mixture in which pure substances are unevenly distributed throughout the mixture. ex. fruit bowl |
| energy | the ability to do work or cause change |
| chemical bond | the force that holds atoms together |
| chemical change | a change in which one or more substances combine or break apart to form new substances |
| physical change | a change in a substance that does not change its identity |
| temperature | a measure of the average energy of motion of particles in a substance |
| physical property | a characteristic of a pure substance that can be observed without changing it into another substance |
| volume | the amount of space that matter occupies |
| mass | a measure of how much matter is in an object |
| density | the ratio of the mass of a substance to its volume |
| endothermic | a change in which energy is taken in |
| exothermic | a change in which energy is given off |
| atom | the basic particle from which all elements are made |
| molecule | a neutral particle made of two or more atoms joined by covalent bonds |
| kinetic energy | energy of an object has due to its motion |
| potential energy | stored energy that results from the position or shape of an object |
| element | a pure substance that cannot be broken down into other substances by chemical or physical means |
| compound | a pure substance made of two or more elements chemically combined |
| homogeneous | a mixture in which pure substances are evenly distributed throughout the mixture, ex. whipped cream |
| heterogeneous | a mixture in which pure substances are unevenly distributed throughout the mixture. ex. fruit bowl |
| energy | the ability to do work or cause change |
| chemical bond | the force that holds atoms together |
| chemical change | a change in which one or more substances combine or break apart to form new substances |
| physical change | a change in a substance that does not change its identity |
| temperature | a measure of the average energy of motion of particles in a substance |
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