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Chapter 3 Lesson

Classifying Matter

Element A substance that that cannot be broken down into other substances by physical or chemical means
Chemical Bond Two atoms attracted to eachother
Molecule A group of more than 1 atoms held together by chemical bonds
Compound A Substance made of more than 1 elements that are chemically combined in a set ratio
Chemical Formula Shows the elements in the compound and the ratio of atoms
Mixture Made of more than 1 susbtances that are together in the same place but are not chemically bonded
Matter anything that takes up space and has mass
Chemistry the study of how matter changes and matter
Susbtance a single kind of matter that is pure
Physical Property A characteristic of a substance that can be observed without changing it.
Chemical Property A characteristic of a substance that describes its ability to change.
Weight A measure of the force of gravity
Mass The amount of matter in an object
International System of Units Measurements for the properties of Matter
Volume The amount of space that matter ocupies
Density A measurement of mass of a given volume
Physical Change Alters the appearance of matter but does not turn any substance in the matter into something else
Chemical Change A change in mater that produces more substances
Law of Conservation of Mass Matter is not created nor destroyed in any chemical or physical change
Temperature the measurement of heat or cold
Thermal Energy total energy of the motion of all of the particles in an object
Endothermic Change A change were energy is absorbed
Exothermic Change The act of releasing energy
Chemical Energy The type of energy that is stored in chemical bonds between atoms