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Chemistry
| Term | Definition |
|---|---|
| Matter | anything that has mass and takes up space |
| Element | a pure substance that contains one type of atom and cannot be broken down into a simpler substance |
| Compound | a substance made of two or more chemical elements bonded to each other |
| Mixture | a combination of two or more substances that are not chemically bonded and can be separated by physical means |
| Homogeneous Mixture | a mixture in which the components are uniformly distributed throughout and where the composition of the mixture is the same throughout |
| Heterogeneous Mixture | a mixture in which the components are not uniform and where different samples from the mixture are not identical to each other |
| Chemical Reaction | reaction that occurs when one or more substances are converted to one or more different substances |
| Chemical Equation | equation that uses symbols and formulas to describe what happens in a chemical reaction |
| Law of Conservation of Mass | in a closed system, matter is neither created nor destroyed; the total mass of reactants equals the total mass of products |
| Reactants | substances that react with each other to make something new |
| Products | resulting molecules in a chemical reaction |
| Acid | compound that is sour and dissolves some metals |
| Base | compound that has opposite properties to acids, is bitter, and feels slippery |
| pH Scale | scale that measures how acidic or basic a substance is, from 0 to 14 |
| Neutral | having pH of 7 and not the characteristics of acids or bases |
| Corrosive | that can break down other substances |
| Cohesion | the attraction of molecules for other molecules of the same kind |
| Adhesion | the attraction of molecules of one kind for molecules of a different kind |
| Surface Tension | the strength of the surface of water due to the attraction of the water molecules |
| Capillary Action | the ability of a liquid to flow upward in narrow spaces due to cohesion and adhesion |