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unit 1 lesson 1-6
| Question | Answer |
|---|---|
| matter | anything that has mass and takes up spare |
| mass | a measure of the amount of matter in an object |
| weight | a measure of the gravitational force exerted on an object |
| volume | the amount of space that an object takes up or, occupied |
| density | the ratio of the mass of of a substance to the volume of the substances |
| physical property | a characteristic of a substance that does not involve a chemical change, such as density,color, or hardness |
| chemical property | a property of matter that describes a substance ability to participate |
| physical change | Physical changes are changes affecting the form of a chemical substance, but not its chemical composition |
| chemical change | s any change that results in the formation of new chemical substances |
| law of conservation of mass | the law |
| atom | the basic unit of a chemical element |
| element | each of more than one hundred substances that cannot be chemically inter converted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic the number of protons in the nuclei of its atoms. |
| compound | a substance made up of atoms of two, or more different elements joined by chemical bonds |
| mixture | made by mixing other substances together. |
| pure substance | is composed of a particular set of molecules or ions. |
| heterogenou | describes something that does not have a uniform structure of composition thoughout |
| homogenous | Describes something that has a uniform structure of composition throughout |
| solid | state of matter in which the volume and shape of a substance are fixed |
| liquid | the state of matter that has a definite volume but not a definite shape |
| gas | a form of matter that does not have a definite volume of shape |
| freezing | the temperature at which a liquid turns into a solid when cooled. |
| melting | make or become liquefied by heat. |
| evaporation | the change of state from a liquid to a gas that usually occurs at the surface of liquid over a wide range of tempeture |
| boiling | the temperature at which a liquid boils and turns to vapor. |
| condesation | water that collects as droplets on a cold surface when humid air is in contact with it. |
| sublimation | the change of state from a solid directly to a gas |
| deposition | the change of state from a gas directly to a solid |
Created by:
18cheern0930
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