Term | Definition |
matter | anything that has mass and takes up space |
mass | describes the amount of matter in an object |
weight | a measure of the gravitational force |
volume | an amount of space an object takes up |
density | measure of the amount of mass in a given volume |
physical property | characteristic of a substance that can be observed and measured without changing the identity of the substance |
chemical property | substances ability to change into a new substance with different properties |
physical change | change that affects one or more physical properties of a substance |
chemical change | occurs when one or more substances change into entirely new substances with different properties |
law of conservation of mass | states that in ordinary chemical and physical changes, mass is not created or destroyed but is only transformed into different substances |
atom | smallest unit of an element that maintains the properties of that element |
element | made up of one or more of the same kind of atom chemically combined |
compound | made up of different kinds of atoms chemically combined |
mixture | contains a variety of elements and compounds that are not chemically combined with each other |
pure substance | elements and compounds |
heterogeneous | mixture is one that does not have a uniform composition |
homogeneous | mixture that the substances are evenly spread throughout |
solid | substance that has a definite volume and shape |
liquid | substance has a definite volume but not a definite shape |
gas | doesn't have a definite volume or shape |
freezing | a liquid becoming a solid |
melting | solid becoming liquid |
evaporation | a particles that are surface of a liquid and gain enough energy to become liquid to a gas |
boiling | rapid change from liquid to gas |
condensation | gas becoming a liquid |
sublimation | from solid state directly into gas |
deposition | gas becoming directly a solid |