Ch 1 Intro to Matter
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35 terms
Terms | Definitions |
|---|---|
 heterogenous mixture | the substances are unevenly distributed |
| chemical bond | a force that holds atoms together |
| molecule | a particle made of two or more atoms bonded together |
| substance | single type of matter that is pure |
| matter | anything that has mass and takes up space |
| mass | the amount of matter in an object |
| solution | homogeneous mixture formed whem substance dissolve |
| International System of Units | used to measure the properties of matter |
| physical property | a characteristic of a pure substance that can be observed without changing it into another substance |
| density | relates the mass of a material in a given volume |
| compound | a pure substance made of 2 or more elements chemically combined |
| homogeneous | a mixture in which substances are evenly distributed |
| weight | a measure of the force of gravity acting on an object |
| element | a pure substance that cannot be broken down into any other substance |
| chemical formula | gives the elements in a compound and the ratio of the atoms |
| volume | the amount of space an object occupies |
| atom | the basic particle from which all elements are made |
| chemical property | describes a substance's ability to change into different substances |
| chemistry | the study of matter and how matter changes |
| mixture | 2 or more substances that are mixed together but not chemically combined |
| physical change | alters the form or apperance of matter but does not turn it into a different substance |
| chemical change | produces one or more new substances |
| law of conservation of mass | matter is not created or destroyed |
| types of physical change | change of state, change in shape or form |
| types of chemical change | combustion,electrolysis,oxidation,tarnish |
| energy | ability to do work |
| temperature | the average kinetic energy of the particles in a sample of matter |
| thermal energy | total energy of the particles in a sample of matter |
| endothermic | a change inwhich energy is taken in |
| exothermic | releases energy |
| kinetic | the energy of matter in motion |
| potential | energy an object has because of position |
| chemical energy | potential energy of chemical bonds |
| electromagnetic energy | travels through space as waves |
| electrical energy | electrons moving from one place to another |
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