| A | B |
|---|
| matter | anything that has mass and volume |
| substance | a type of matter with a fixed composition |
| element | a pure substance that cannot be broken down |
| compound | a unique substance that forms when two or more elements combine chemically |
| atom | Smallest particle of an element that still has the element’s properties. |
| molecule | Smallest particle of a compound that still has the compound’s properties. |
| homogeneous mixture | a mixture with the same composition throughout and the parts are not easily determined |
| heterogeneous mixture | a mixture in which different materials can be distinguished easily |
| suspension | a heterogeneous mixture with large particles that will settle out |
| solution | a homogeneous mixture of small particles that cannot be seen |
| colloid | a homogeneous mixture with medium-sized particles that can scatter light |
| physical property | properties that can be measured or observed without matter changing to a different substance |
| chemical property | properties of matter can be measured or observed only when matter undergoes a change to become an entirely different substance |
| heating curve | a graph that shows the phase changes of a substance |
| reactivity | the ability of matter to combine chemically with other substances |
| flammability | the ability to burn |
| melting | a solid changes into a liquid |
| freezing | a liquid changing into a solid |
| evaporation | liquid changes to gas from the surface of the liquid without boiling |
| vaporization | liquid changes to gas through boiling |
| sublimation | a solid changes directly to a gas |
| deposition | a gas changes directly to a solid |
| condensation | a gas changes to a liquid |
| solid | matter that has definite shape and definite volume |
| liquid | matter that has definite volume but not definite shape |
| gas | matter that has not definite shape or volume |
| plasma | state of matter that resembles a gas but has certain properties that a gas does not have |
| crystal | Rigid, lattice-like framework of many atoms bonded together that is formed by some compounds such as table salt (NaCl). |
| Law of Conservation of Mass | states that matter cannot be created or destroyed in chemical reactions. |
| mass | Amount of matter in a substance or object. |
| energy | Ability to cause changes in matter. |
| volume | Amount of space that matter takes up. |
| weight | Measure of the force of gravity pulling on an object. |
| temperature | Average kinetic energy of particles of matter. |
| density | Amount of mass in a given volume of matter; calculated as mass divided by volume. |
| conduction | Transfer of thermal energy between particles of matter that are touching. |
