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Belfy chapter 2
| Question | Answer |
|---|---|
| Matter | Anything that has mass and takes up space |
| Chemistry | The study of the properties of matter and how matter changes. |
| Substance | A single type of matter that is the same throughout (pure) |
| Physical Property | A characteristic of a substance that can be observed without changing it into another substance |
| Chemical Property | A characteristic of a pure substance that describes it's ability to change it into different substances. |
| Elements | Pure substances made of all the same kind of atom. |
| Atoms | The smallest particle of matter from which all elements are made. |
| Chemical bond | A force of attraction between two or more atoms. |
| Molecule | Two or more atoms held together by a chemical bond. |
| Compound | A pure substance made of two or more elements chemically combined. |
| Mixtures | A type of matter made of two or more substances , elements, compounds or both that have not chemically combined. Each substance keeps it's origional properties. The parts are not in a set ratio. |
| Heterogeneous mixture | A mixture that you can see the different parts that make it up. (Nuts and bolts) |
| Homogeneous mixture | A type of mixture that is so evenly mixed that you cannot see the individual parts |
| Solution | A type of homogeneous mixture. The particles of one substance fill the spaces between the particles of another substance. |
| Seperating mixtures physically. | Filtering,using a magnet, evaporating, using tweesers, straining, distilation. |
| Weight | A measure of the pull of gravity on an object. |
| Mass | A measure of the amount of matter. |
| International System of Units | A system of measuring used by all scientists. Abreviated(S.I.) |
| Common SI Units | Mass = Kilogram Volume = cm3 or mls. Length = Meters |
| Volume | The amount of space that matter takes up. |
| Density | The relationship between mass and volume for a given object. |
| Density Formula | D = Mass / Volume |
| Volume Formula | V = L X W X H |
| Volume of Irregular shaped object. | Final volume - Initial volume |
| Physical Change | Any change in matter that alters the form or appearance but not the matter it'self. Particles are the same before and after. |
| Chemical Change | A change in matter that produces one or more new substances. |
| Law of Conservation of Mass | The fact that matter cannot be created or destroyed during any chemical or physical reaction. |
| Energy | The ability to do work. |
| Temperature | A measure of the average energy of the motion of the molecules of a substance. |
| Thermal Energy | AKA Heat energy. The total energy of all the particles in an object or substance. |
| Endothermic | A chemical or physical reaction that takes in heat. |
| Exothermic | A chemical or physical reaction that gives off heat. |
| Kinetic energy | The energy of matter in Motion. |
| Potential Energy | The energy an object has because of it's position. |
| Chemical Energy | A type of potential energy stored in the bonds that hold atoms together. |
| Electromagnetic Energy | A form of energy that travels through empty space as a wave. |
| Electric Energy | The energy of electrically charged particles moving from place to place. |
| Electrode | A metal strip put in a solution with a wire attached to allow the flow of electricity during electrolysis. |
| Electrolysis | A chemical change that uses electricity flowing through a solution. |
Created by:
vbelfy
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