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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 properties of that element . |
boil | the change in state from a liquid to a gas. |
condense | the change in state from i gas to a liquid. |
evaporate | the process by which molecules at the surface of a liquid absorb enough energy to change to a gas. |
freeze | the temperature at which a liquid freezes. |
gas | a state of matter which with no definite shape or volume. |
inert | having little or no ability to react. |
Kinetic energy' | Energy that an object has due to its motion. |
Liquid | A state of matter that has no definite volume. |
Matter | Anything that has mass and takes up space . |
Melt | The temperature at which a substance changes from solid to a liquid . |
Molecule | A natural group of two or atoms held together by covalent bonds. |
Particles | Smallest possible unit or matter |
Particles motion | Way in which atoms,ions,or molecules move. |
Phase | A physically distinctive from matter ,such as a solid ,liquid. |
phase change | a change from one state(solid,or,liquid or gas)to another without a change in chemical composition |
pressure | the physically forced 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 |
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 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 |