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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 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 into 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 due to its motion. |
Liquid | A state of matter with no definite shape or 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 held together by 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 a solid, liquid, or gas. |
Phase change | A change from one state (solid, 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 work together as a whole |
Temperature | A measure of the average energy of motion of the particles of a substance |
Thermal Energy | The total kinetic and potential energy all of 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 |