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29 Cards in this Set
- Front
- Back
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MATTER |
Anything that has mass and occupies space. |
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MASS |
A measurement of the amount of matter in an object. |
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WEIGHT |
A measurement of the gravitational force acting on an object. |
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PHYSICAL PROPERTIES |
Properties of matter that can be observed or measured without trying to change the composition of the matter being studied. |
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CHEMICAL PROPERTIES |
Properties matter demonstrates when attempts are made to change it into new substances. |
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PHYSICAL CHANGES |
Changes matter undergoes without changing composition. |
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CHEMICAL CHANGES |
Changes matter undergoes that involve changes in composition. |
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SCIENTIFIC MODELS |
Explanations for observed behavior in nature. |
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MOLECULE |
The smallest particle of a pure substance that and is capable of a stable independent existence. Alternatively, a molecule is the limit pf physical subdivision for a pure substance. |
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DIATOMIC MOLECULES |
Molecules that contain two atoms. |
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HOMO-ATOMIC MOLECULES |
Molecules that contain only one kind of atom. |
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HETERO-ATOMIC MOLECULE |
Molecules that contain two or more kinds of atoms. |
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TRI-ATOMIC MOLECULES |
Molecules that contain three atoms. |
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POLY-ATOMIC MOLECULES |
Molecules that contain more than three atoms. |
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ATOMS |
The limit of chemical subdivision for matter. |
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PURE SUBSTANCE |
Matter that has a constant composition and fixed properties. |
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MIXTURE into tw |
A physical blend of matter that can theoretically be physically separated into two or more components. |
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HOMOGENEOUS MATTER |
Matter that has the same properties throughout the sample. |
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SOLUTIONS |
Homogeneous mixtures of two or more pure substances. |
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HETEROGENEOUS MATTER |
Matter with properties that are not the same throughout the sample. |
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ELEMENT |
A pure substance consisting of only one kind of atom in the form of homoatomic molecules or individual atoms. |
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COMPOUND |
A pure substance consisting of two or more kinds of atoms in the form of heteroatomic molecules or individual atoms. |
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BASIC UNIT OF MEASUREMENT |
A specific unit from which other units for the same quantity are obtained by multiplication or division. |
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DERIVED UNIT OF MEASUREMENT |
A unit obtained by multiplication or division of one or more basic units. |
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SCIENTIFIC NOTATION |
A way of representing numbers consisting of a product between a nonexponential number and 10 raised to a whole number exponent that may be positive or negative. |
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STANDARD POSITION FOR A DECIMAL |
In scientific notation, the position to the right of the first nonzero digit in the nonexponential number. |
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SIGNIFICANT FIGURES |
The numbers in a measurement that represent the certainty of the measurement, plus one number representing an estimate. |
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EXACT NUMBERS |
Numbers that have no uncertainty, numbers from defined relationships, counting numbers, and numbers that are part of simple fractions. |
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FACTORS |
Fractions obtained from numerical relationships between quantities. |
