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physical science 1
Term | Definition |
---|---|
Atom | the basic particle which all elements are made; the smallest particle of an element that has the properties of that element |
Boil | the change is state from a liquid to a gas |
condense | the change in state from a gas to a liquid |
evaporate | the process by which molecules at the surface of a liquid absorb enough energy to change a gas |
freeze | the temperature at which a liquid freezes |
gas | a state of matter with no definite shape or volume |
inert | having little or no ability to react |
kinetic energy | energy that an object has no due to its motion |
liquid | a state of matter that has no definite shape but has a definite volume |
matter | anything that has mass and takes up space |
melt | the temperature at which a substance changes from a solid to a liquid |
molecule | a neutral group of two or more atoms help together by covalent bonds |
particle | smallest possible unit if matter |
particle motion | ways in which atoms, ions, or molecules move |
phase | a physically distinctive from of matter, such as solid, liquid, or gas |
phase change | a change from one state (solid or liquid or gas) to another without 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 has a definite shape and volume |
temperature | a measure of the average energy of motion of the particles of an object |
thermal energy | a measure of the average energy of all the particles of an 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 by electromagnetic waves |