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Physical Science 1
| Term | Definition |
|---|---|
| Atom | the basic particle from which all elements are made the smallest particle of an element that has the properties of that element |
| Boil | the change in state from liquid to gas |
| condense | the change in state from gas to liquid |
| Evaporate | the process by which molecules at the surface of a liquid absorb enough energy to change to gas |
| freeze | the temperature at with a liquid freezes |
| gas | a sate of matter with no definta shape or volume |
| inert | having little or no ability to react |
| kinetic energy | energy that on object has due to it motion |
| liquid | a state of matter that hes no definite shape but has a |
| matter | anything that has mass and takes up space |
| melt | the temperature at which a substance change from a solid to a liquid |
| molecule | a neutral group of two or more atom held together by covalent bonds |
| particle | smallest possible unit of matter |
| particle motion | ways in which atom , ions, or molecules move |
| phase | a physically distinctive form of matter, such as a solid , liquid or gas |
| phase change | a change from one state (solid or liquid or gas to another without a change in chemical composition |
| pressure | the physical force exerted on an object |
| pure substance | A substance made of only one kind of matter and having definite properties |
| solid | A state of matter that has a definite shape and volume |
| system | A group of parts that work together as whole |
| temperature | A measure of the average energy of motion of the particles of a substance |
| thermal Energy | the total kinetic and potential energy of all the particles of a object |
| vapor | gaseous state of a substance that is a liquid or a solid at room temperature |
| conduction | the transfer of thermal energy from one object to another |
| convection | the transfer of thermal energy by the movement of fluid |
| Radiation | the transfer of energy b electromagnetic waves |