| A | B |
|---|
| matter | anything that takes up space and has mass |
| solid | matter with definite shape and volume |
| liquid | matter that has definite volume but no shape |
| viscocity | a liquid's resistance to flow |
| surface tension | uneven forces acting on the particles on the surface of a liquid (u can float a needle on the surface of water) |
| gas | matter that does not have definite shape or volume |
| thermal energy | total kinetic and potential energy of all the particles in a sample of matter |
| temperature | the average kinetic energy of the individual particles |
| heat | the movement of thermal energy from a substance at a higher temperature to one at a lower temperatue |
| melting | the change from the solid state to the liquid state |
| freezing | the change from the liquid state to the solid state |
| vaporization | the change from a liquid to a gas |
| condensation | opposite of vaporization, when particles move slowly enough for their attractions to bring them together, droplets of liquid form |
| pressure | is equal to the force exerted on a surface divided by the total area over which the force is exerted |
| buoyant force | the difference in pressure results in an upward force on an object immersed in a fluid |
| Archimedes' principle | if you place an object in a beaker filled to the brim with water, some watr will spill out if you weigh the spilled water you will find the buoyant force on the object |
| Pascal's principle | when force is applied to a confined fluid, an increase in pressure is transmitted equally to all parts of the fluid. (squeeze a plastic container filled with water) |
