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Chap 1 Intro2Matter
| Question | Answer |
|---|---|
| Matter | is anything that has mass and takes up space. |
| Chemistry | is the study of the properties of matter and how matter changes. |
| Substance | is a single kind of matter that is pure, meaning it always has a specific makeup—or composition—and a specific set of properties. |
| Physical Property | is a characteristic of a pure substance that can be observed without changing it into another substance. |
| Chemical Property | is a characteristic of a pure substance that describes its ability to change into different substances. |
| Element | is a pure substance that cannot be broken down into any other substances by chemical or physical means. |
| Atom | is the basic particle from which all elements are made. |
| Chemical Bond | is a force of attraction between two atoms. |
| Molecules | atoms combine to form larger particles |
| Compound | is a pure substance made of two or more elements chemically combined in a set ratio. |
| Chemical Formula | shows the elements in the compound and the ratio of atoms. |
| Mixture | is made of two or more substances—elements, compounds, or both—that are together in the same place but are not chemically combined. |
| Homogenous Mixture | so evenly mixed that you can’t see the different parts |
| Heterogenous Mixture | you can see the different parts |
| Solution | is an example of a homogeneous mixture. |
| Weight | is a measure of the force of gravity on you |
| Mass | of an object is the measurement of the amount of matter in the object. |
| International System of Units | To measure the properties of matter, scientists use a system called |
| Volume | The amount of space that matter occupies |
| Density | relates the mass of a material in a given volume. |
| Physical Change | is 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 | change in matter that produces one or more new substances |
| Law of Conservation of Mass | The fact that matter is not created or destroyed in any chemical or physical change |
| Energy | is the ability to do work or cause change. |
| Tempurature | is a measure of the average energy of random motion of particles of matter. |
| Thermal Energy | is the total energy of all of the particles in an object. |
| Endothermic Change | a change in which energy is taken in. |
| Exothermic Change | releases energy |
| Kinetic Energy | the energy of matter in motion |
| Potential Energy | is the energy an object has because of its position |
| Chemical Energy | The internal energy stored in the chemical bonds between atoms is a form of potential energy |
| Electromagnetic Energy | a form of energy that travels through space as waves |
| Electrical Energy | is the energy of electrically charged particles moving from one place to another |
| Electrodes | In electrolysis two metal strips called_________ are placed in a solution but do not touch. |
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AlyMcG1027
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