| A | B |
|---|
| chemical | any substance that has a defined composition |
| chemical reaction | the process by which one or more substances change to produce one or more different substances |
| States of matter | the physical forms of matter |
| reactant | a substance or molecule that participates in a chemical reaction |
| product | a substance that forms in a chemical reaction |
| matter | anything that has mass and volume |
| volume | a measure of the size of a body or region in 3 dimensional space |
| mass | a measure of the amount of matter in an object |
| weight | the mass of an object with the amount of gravitational force on it |
| quantity | something that has magnitude, size or amount |
| unit | a quantity adopted as a standard of measurement |
| conversion factor | a ratio that is derived from the equality of two different units and that can be used to convert from one unit to the other |
| physical property | a characteristic of a substance that does not involve a chemical change, such as density, color, or hardness |
| density | the ratio of the mass of a substance to the volume of the substance |
| chemical property | a property of matter that describes a substance's ability to participate in chemical reactions |
| atom | the smallest unit of an element that maintains the properties of that element |
| pure substance | a sample of matter, either a single element or a single compound |
| element | a substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number |
| molecule | the smallest unit of a substance that keeps all of the physical and chemical properties of that substance; it can consist of one atom or two or more atoms bonded together |
| compound | a substance made up of atoms of tow or more different elements joined by chemical bonds |
| mixture | a combination of two or more substances that are not chemically combined |
| homogeneous | describes something that has a uniform structure or composistion throughout |
| heterogeneous | composed of dissimilar components |
