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Matter
| Term | Definition |
|---|---|
| atom | the smallest unit of an element that has the properties of that element (related word: atomic) |
| element | a pure substance that cannot be broken down into simpler substances by chemical reactions |
| substance | the physical matter of which living or nonliving things are composed |
| mixture | a combination of two or more substances that do not combine chemically |
| homogeneous | a substance in which all of the parts are the same throughout; uniform distribution |
| heterogeneous | a substance in which the parts are clearly different shapes and colors; different throughout; not uniform |
| physical property | a characteristic that can be observed, such as texture, color, odor, melting point, boiling point, density, or measured such as mass, length, volume, that is used to describe matter and can be observed or measured without changing its composition |
| chemical property | a characteristic of a substance that is measurable or observable during a chemical reaction; includes pH, heat of combustion, reactivity, etc. |
| malleability | the ability of a material to be pressed or beaten into a thin sheet or to be shaped without breaking |
| metal | element on the right of the periodic table; good conductor, high density, shiny, malleable |
| nonmetal | element on the left of the periodic table; poor electrical conductor, dull, brittle and tend to accept electrons easily |
| metalloid | found on the stair step of the periodic table; these element exhibit both metallic and nonmetallic properties |
| compound | a chemical combination of two or more elements |
| evaporation | the process in which matter changes from a liquid to a gas (related word: evaporate) |
| condensation | the process by which a gas changes into a liquid |
| mass | the amount of matter in an object |
| matter | Material that has mass and takes up some amount of space. The stuff that all objects and substances in the universe are made of. |
| density | an object's mass divided by its volume; a measure of how many particles are packed together into a certain amount of space (related word: dense) |
| chemical change | a chemical reaction; a process that changes substances into new substances (related word: chemical reaction) |
| physical change | a change in matter that does not affect its chemical composition |
| properties | characteristics that help us identify or classify matter |
| conductivity | how well a substance allows heat or electricity to flow through it |
| molecule | two or more combined atoms that are the smallest particle of a substance that keeps the properties of the substance |
| volume | the space matter occupies (takes up) |
| luster | how well a substance reflects light, shiny means lots of reflection, dull means little reflection |
| precipitate | a solid that forms when two solutions are mixed |
Created by:
poolk1
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