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Physical Science
Unit One, Chapter One 2015
| Question | Answer |
|---|---|
| Matter | Anything that has mass and takes up space |
| Chemistry | Study of the properties of matter and how matter changes |
| Substance | Single kind of matter, that is pure, and has a specific set of properties |
| Physical Property | A characteristic of a pure substance that can be observed without changing it into another substance |
| Chemical Property | A characteristic of a pure substance that describes its ability to change into different substances |
| Element | A pure substance that cannot be broken down into any other substances |
| Atom | The basic particle from which all elements are made |
| Chemical Bond | A force of attraction between two atoms |
| Molecule | Groups of two or more atoms held together by chemical bonds |
| Compound | Pure substance made of two or more elements chemically combined in a set ratio |
| Chemical Formula | The elements in a compound and the ratio of atoms |
| Mixture | Made of two or more substances |
| Heterogeneous Mixture | You can see the different parts in the mixture |
| Homogeneous Mixture | Mixed evenly, so you cannot see the different parts of the mixture |
| Solution | An example of a homogeneous mixture |
| Physical Change | Any change that alters the form or appearance of matter, but does not make any substance in the matter into a different substance |
| Chemical Change | A change in matter that produces one or more new substances |
| Law of Conservation of Mass | Matter is neither created nor destroyed in any chemical or physical change |
| Energy | The ability to do work |
| Temperature | Measure of the average energy of random motion of particles of matter |
| Thermal Energy | Total energy of all of the particles in an object |
| Endothermic Change | A change in which energy is taken in |
| Exothermic Change | A change that releases energy |
| Pressure | The force of its outward push divided by the area of the walls of the container (Pascals) |
| Boyle's Law | Pressure of gas, at a constant temperature, increases, the volume decreases. When the pressure of the gas decreases, at a constant temperature, the volume of the container increases |
| Charles' Law | At a constant pressure, when the temperature of a gas increases, the volume increases, When the temperature of a gas decreases, at a constant pressure, the volume decreases. |
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