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| an observation of natural phenomena carried out in a controlled manner so that the results can be duplicated and rational conclusions obtained. |
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| a concise statement or mathematical equation about a fundamental relationship or regularity of nature |
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| a tentative explanation of some regularity of nature |
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| a tested explanation of basic natural phenomena |
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| the quantity of matter in a material |
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| all of the objects around you; whatever occupies space and can be perceived by our senses |
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| Law of Conservation of Mass |
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| the total mass remains constant during a chemical change (chemical reaction) |
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| the form of matter characterized by rigidity; a solid is relatively incompressible and has fixed shape and volume |
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| the form of matter that is relatively incompressible fluid; a liquid has a fixed volume but no fixed shape |
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| the form of matter that is an easily compressible fluid; a given quantity of gas will fit into a container of almost any size and shape |
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| the three forms that matter can assume - solid, liquid, and gas |
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| a change in the form of matter but not its chemical identity |
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| Chemical change (chemical reaction) |
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| 1. a change in which one or more kinds of matter are transformed into a new kind of matter or several new kinds of matter 2. the rearrangement of the atoms present in the reacting substances to give new chemical combinations present in the substances formed by the reaction |
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| a characteristic that can be observed for a material without changing its chemical identity |
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| a characteristic of a material involving its chemical change |
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| a kind of matter that cannot be separated into other kinds of matter by any physical process |
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| any substance that cannot be broken down into simpler substances |
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| (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight |
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| Law of Definite Proportions |
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| law stating that every pure substance always contains the same elements combined in the same proportions by weight- law of constant composition |
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| 2 or more elements or compounds physically together, not pure, separated in PHYSICAL REACTIONS |
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| mixture that does not appear to be the same throughout |
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| well mixed, same throughout, cannot see particles |
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| one of several different homogeneous materials present in the portion of under study |
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| fixed standard measurements |
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| the closeness of the set of values obtained from identical measurements of a quantity |
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| the closeness of a single measurement to its true value |
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| the digits in a measured number that include all certain digits and the first uncertain digit. |
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| number of significant figures |
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| number of digits reported for the value if a measured or calculated quantity, indicating the precision of the value |
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| number that arises when you count items or sometimes when you define a unit |
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| adjusting the last digit, greater than 5 |
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| International System (SI) |
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| French, a particular choice of metric units |
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| a prefix used in the SI to indicate a power of ten |
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| which equals 10 ^-10, a Non- SI unit of length |
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| Centigrade Scale- temperature scale in general scientific use |
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| SI base unit of temperature. absolute temperature |
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| a unit derived by combining SI base units |
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| unit of volume equal to a cubic decimeter |
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| mass per unit volume, D= m/v |
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| factor-label method, the method of calculation in which one carries along the units for quantities |
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| a factor equal to 1 the converts a quantity expressed in one unit to a quantity expressed in another unit |
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