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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 a gas. |
Freeze | a temperature on 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 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 on which a substance changes from solid to liquid. |
Molecule | a neutral group of two or more atoms held together covalent bonds. |
Particle | smallest possible unit of matter. |
Particle motion | ways in which atoms,ions,or molecules move. |
Phase | a physically distinctive form of matter,such as solid,liquid or gas. |
Phase change | a change from one state to another without a change in chemical composition. |
Pressure | the physical force exerted from an object. |
Pure substance | a substance made of one kind of matter and having definite properties. |
Solid | a state of matter that has definite shape and volume. |
System | a group of parts that work together as a whole. |
Temperature | a measure of the average energy of motion in the particles of a substance. |
Thermal energy | the total kinetic and potential energy of all the particles of an object. |
Vapor | gaseous state of 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. |