| A | B |
|---|
| anything that has mass and takes up space | matter |
| a measure of the amount of matter in an object | mass |
| a measure of the gravitational force exerted on an object; it can change with the location of the object in the universe | weight |
| the amount of space that an object takes up, or occupies | volume |
| the ratio of the mass of a substance to the volume of the substance | density |
| a characteristic of a substance that does not involve a chemical change, such as density, color, or hardness | physical property |
| a property of matter that describes a substance's ability to participate in chemical reactions | chemical property |
| a change that occurs when one or more substances change into entirely new substances with different properties | chemical change |
| the law that states that energy cannot be created or destroyed but can be changed from one form to another | law of conservation of energy |
| the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes | law of conservation of mass |
| a change of matter from one form to another without a change in chemical properties | physical change |
| the smallest unit of an element that maintains the properties of that element | atom |
| a substance that cannot be separated or broken down into simpler substances by chemical means | element |
| a substance made up of atoms of two or more different elements joined by chemical bonds | compound |
| a combination of two or more substances that are not chemically combined | mixture |
| a sample of matter, either a single element or a single compound, that has definite chemical and physical properties | pure substance |
| describes something that does not have a uniform structure or composition throughout | heterogeneous |
| describes something that has a uniform structure or composition throughout | homogeneous |
| the number of protons in the nucleus of an atom | atomic number |
| a one-, two-, or three-letter abbreviation of an element | chemical symbol |
| a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number of protons in the nucleus is the atomic number | proton |
| a subatomic particle that has no charge and that is located in the nucleus of an atom | neutron |
| a subatomic particle that has a negative charge | electron |
