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| the standard to which test results can be compared |
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| analyzed information from and experiment or investgation |
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| common way to test a hypothesis |
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| educated guess based on knowledge and observation |
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| a statement basedon your data and oberservations that proves your hypothesis correct or incorrect |
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| anything that takes up space |
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| explantation of how particles of matter behave |
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| an increase in the size of a substance when the temp. is increased |
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| the buoyant force of an object is equal to the weight of the fluid displaced by the object; if an object has a higher densty than a substance it will sink |
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| states that as the speed of a moving fluid (liquid or gas) increases, the pressure within the fluid decreases. |
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| the volume of a gas increaces with increasing temperature, as long as pressure doesn't change |
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| if you decrease the volume of a container of gas and hold the temp. constant the pressure of the gas will increase |
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| all atoms alike in a substance |
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| a substance in which the atoms of 2 or more elements are combined in a fixed proportion |
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| materials can be seen easily |
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| has 2 or more gas, liquid,or solid substances blended good |
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| homogenou mixture that contain very samll particles, that never settle to the bottom of a container |
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| type of mixture that never settles |
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| a change of one substance to another |
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| a change in size,shape,or state of matter |
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| Law of conservation of mass |
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| no matter is created or destroyed:when a log goes to ashes |
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| part of the atom that has a charge of +1 |
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| part of the atom that has no electric charge |
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| part of the atom that has a charge of -1 |
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| tells what elements a compund contains and the exact numbers of the atom of each element in a unit of that compund |
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| how many electrons an atom has gained lost or shared to become stable |
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| they form ionic nd covalent bonds with other elements: B Si Ge As Sb Te Po At |
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| hammered or rolled into sheets: metals would be this |
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| most compunds containing the element carbon |
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| substance being dissolved |
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| substances dissolving a solute |
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| a change in 1 or more substance are converted into new substances |
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| # that represents the # of units of each part taking place in the substance |
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| 2 or more subsances combine to form another substance A + B > AB |
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| one or more substance breaks down or decomposes into 2 or more substances |
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| single deplacement reaction |
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when one element replaces another element in a compund
A+BC > AC+B |
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the positive ions of 1 compund replaces the positive ion of otherto form 2 new compunds
AB+CD > AD+CB |
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| an organic compund that changes color in acid or base |
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