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matter and energy
unit 1, lesson 1-6
| Term | Definition |
|---|---|
| matter | anything that has mass and takes up space |
| mass | describes the amount of matter in an object |
| weight | a measure of the gravitational force on an object |
| volume | the amount of space that an object takes up, or occupies, is known as the object |
| density | a measure of the amount of mass in a given volume |
| physical property | a characteristic of a substance that can be observed and measure without changing the identity of the substance |
| chemical property | describes a substance ability to change into a new substance with different properties |
| physical change | the change that affects one or more physical properties of a substance |
| chemical change | occurs when one or more substances change into entirely new substances with different properties |
| law of conversation of mass | states that in ordinary chemical and physical changes, mass is not created or destroyed but is not transformed into different sunstances |
| atom | the smallest unit of an element that maintain the properties of that element |
| elements | made up of one or more of the same kind of atom chemically combined |
| compound | made up of different kinds of atoms chemically combined |
| mixture | contains a variety of elements and compounds that are not chemically with each other |
| pure substance | a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity |
| heterogeneous | one that does not have a uniform composition |
| homogeneous | a mixture of each part of the sugar-water mixture |
| solid | the particles in a solid are close together and do not move freely. |
| liquid | particles in liquid, have more kinetic energy than particles in a solid do. |
| gas | a substance in gaseous state has particles with the most kinetic energy of the three states |
| freezing | the change in state in which a liquid becomes a solid |
| melting | the change of state from a solid to a liquid |
| evaporation | a liquid is warmed, its particles gain energy. some particle gain enough energy that they escape from the surface of the liquid and become a gas. |
| boiling | a rapid change from a liquid to a gas, or vapor |
| condensation | the change from a gas to a liquid. |
| sublimation | the change from a solid state directly into a gas. |
| deposition | the change in state from a gas directly to a solid. |
Created by:
18bmartinez0209
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