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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 |
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 to 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 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 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 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 work together as a whole |
Temperature | A measure of the average energy of motion of 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 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 |