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physical science 1

TermDefinition
atom the basic particle from which all elements are made
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 the temperature at which a liquid freezes
gas a state of mass with no definite shape or volume
insert having little or no energy to react
kinetic energy energy that an object has due to its motion
liquid a state of matter with no definite shape of volume
matter anything that has mass and takes up space.
melt the temperature at which a solid turns to 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 to another without a change in chemicals 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 motion of the particles of an 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 object to another
convection the transfer of thermal energy by the movement of fluid
radiation the transfer of energy by electromagnetic waves
Created by: user-1717978
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