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Unit 1 Vocabulary
Vocabulary Words
23
Chemistry
9th Grade
09/06/2011

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Term
Physical Property
Definition
Any characteristic of a material that can be observed or measure without changing the composition of the substances in the material
Term
Chemical Property
Definition
Any property that produces a change in the composition of matter
Term
Density
Definition
The ratio of a material's mass to its volume
Term
Solubility
Definition
The maximum amount of solute that normally dissolves in a given amount of solvent at a certain temperature
Term
Viscosity
Definition
the tendency of a liquid to keep from flowing; resistance to flowing
Term
Boiling Point
Definition
The temperature at which a substance boils
Term
Melting Point
Definition
The temperature at which a substance changes from a solid to a liquid
Term
Chemical Change
Definition
A change that occurs when a substance reacts and forms one or more new substances
Term
Physical Change
Definition
A change that occurs when some properties of a material change, but the substances in the material stay the same
Term
Sublimation
Definition
the phase change in which a substance changes from a solid to a gas without changing into a liquid first
Example: Dry Ice
Term
Evaporation
Definition
The process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point
Term
Boiling
Definition
Water turning into a gas and bubbling
Term
Precipitate
Definition
A solid that forms and separates from a liquid mixture
Term
Atom
Definition
The smallest particles of an element
Term
Molecule
Definition
A neutral group of atoms that are joined together by one or more covalent bonds
Term
Element
Definition
A substance that cannot be broken don into simpler substances
Term
Compound
Definition
A substance that is made from two or more simpler substances and can be broken don into those simpler substances
Term
Homogeneous Mixture
Definition
A type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another
Term
Heterogeneous Mixture
Definition
A type of mixture in which the parts of the mixture are noticeably different from one another
Term
Solution
Definition
A mixture that forms when substances dissolve and form a homogeneous mixture
Term
Kinetic Theory
Definition
The energy an object has due to its motion
Term
Plasma
Definition
A state of matter in which atoms have been stripped of their electrons
Term
Temperature
Definition
A measure of how hot or cold an object is compared to a reference point
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