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Science Vocab #1
Review
20
Science
Not Applicable
01/17/2005

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Cards

Term
electrode
Definition
a metal strip used in electroysis
Term
matter
Definition
anything that has weight and takes up space
Term
electroysis
Definition
using an electric current to break the bond between elements
Term
characteristic properties
Definition
they never change, and can be used to identify a substance
Term
compounds
Definition
two or more substances chemically combined
Term
elements
Definition
they can not be broken down by ordinary chemical means
Term
Democritus
Definition
a Greek philosopher
Term
density
Definition
mass and volume
Term
atoms
Definition
the smallest part of an element
Term
boiling point
Definition
the tempature at which a substance turns from a liquid to a gas
Term
ore
Definition
a rock with metal in it
Term
molecule
Definition
a group of atoms that are joined together as one unit
Term
chemical change
Definition
these make new substances
Term
physical changes
Definition
these change the form of a substance, but not its identity
Term
chemical activity
Definition
the ability to undergo chemical change
Term
melting point
Definition
the tempature at which a substance changes from a solid to a liquid
Term
chemical bond
Definition
the force that holds two atoms together
Term
mixtures
Definition
two or more substances mixed together but not chemically combined
Term
John Dalton
Definition
a British school teacher
Term
pure substances
Definition
they are made of only one kind of matter, and has definite properties
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