Energy
The study of the properties of matter and how matter changes
Chemistry
A single kind of matter that is pure and has a specific set of properties
Substance
A change in which energy is given off
Exothermic Change
The basic particles from which all elements are made
Atom
two or more substances that are mixed together but not chemically combined
Mixture
A neutral particle made of two or more atoms joined by covalent bond
Molecule
Physical Property
A mixture in which pure substances are unevenly distributed throughout the mixture
Heterogenous Mixture
a mixture in which substances are evenly distributed throughout the mixture
Homogenous Mixture
A combination of symbols that represents the elements in a compound and their proportions
Chemical Formula
The system of units (SI) used by scientist to measure the properties of matter
International System of Units
A well-mixed mixture containing a solvent and at least one solute that has the same properties throughout
Solution
A pure substance that cannot be broken down into other substance by chemical or physical means
Element
A change in a substance that does not change its identity
Physical change
A change in which one or more substances combine or break apart to form new substances
Chemical Change
The ration of the mass of a substance to its volume
Density
A measure of the force of gravity on an object
Weight
A characteristic of a pure substance that describes its ability to change into a different substance
Chemical Property
the force that holds atoms together
Chemical Bond
Weight
A measure of the force of gravity on an object
The amount of space that matter occupies
Volume
A measure of how much matter is in an object
Mass
Anything that has mass and occupies space
Matter
A change in which energy is taken in
Endothermic change
A pure substance made of 2 or more elements chemically combined
Compound