Matter and Energy Chapter 1 & 2 vocabulary Chemistry

matter Anything that has mass and volume.

weight The force of gravity on an object

volume The amount of space that matter in an object occupies V=lwh

atom The smallest particle of an element that has the chemical properties of that element

molecule When two or more atoms bond together or combine

element Substance that contains only a single type of atom

compound Substance that consists of two or more different types of atoms bonded together

mixture A combination of two or more substances that do not combine chemically and remain the same substances

Heterogeneous mixture mixture that consists of visibly different substances

Homogeneous mixture Mixture that has the same uniform appearance and composition throughout

States of matter Different forms in which matter can exist

solid State of matter that has a definite shape and definite volume

liquid State of matter that has a definite volume but not a definite shape

gas State of matter that does not have a definite shape or volume

Physical change Change in a substance that does not change the substance into a different one

Chemical change Change of one substance into another substance

melting Process where a solid becomes a liquid

freezing Process where a liquid becomes a solid

evaporation Process which a liquid becomes a gas

sublimation Process which a solid changes directly to a gas

boiling Process which a liquid becomes a gas

condensation Process which a gas becomes a liquid