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Vocab Chapter 4
| Term | Definition |
|---|---|
| Physical Change | a change from one state (solid or liquid or gas) to another without a change in chemical composition |
| Chemical Change | a change that occurs when one or more substances change into entirely new substances with different properties |
| Mixture | (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding) |
| Substance | that which has mass and occupies space |
| Physical Property | a characteristic that can be observed or measured without changing the identity of the substance |
| Chemical Property | a property used to characterize materials in reactions that change their identity |
| Density | Mass/volume the amount of matter in a given space |
| Boiling Point | the temperature at which a liquid boils at sea level |
| Melting Point | the temperature at which a substance changes from a solid to a liquid |
| Solubility | the ability of one substance to dissolve in another at a given temperature and pressure |
| Law of Conservation of Matter | states that matter is neither created nor destroyed, only changed in form |
| Law of Conservation of Energy | the law that states that energy cannot be created or destroyed but can be changed from one form to another |
| Endothermic | describes a process in which heat is absorbed from the environment |
| Reactivity | the ability of a substance to combine chemically with another substance |
| Combustibility | the ability to burn |
| Exothermic | chemical reaction in which energy is primarily given off in the form of heat |
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