Particle - A very tiny object such as an atom or molecule, too small to be seen by a microscope., Particle model - A way to think about how substances behave in terms of small moving particles, Diffusion - The process by which particles in liquids and gases spread out through random motion from a region of many particles to one where there are fewer, Evaporate - Change of liquid to gas at the surface of a liquid at any temperature, Boil - Change from liquid to gas of all the liquid when the temperature reaches the boiling point., Condense - Change of state from gas to liquid when the temperature reaches the boiling point., Melt - Change from solid to liquid when the temperature reaches the melting point., Freeze - Change from liquid to solid when the temperature reaches the melting point., Sublimation - Change from a solid to a gas without becoming a liquid., Density - How much matter there is in a particular volume or how closely packed the particles are,

Year 7 Particle Model Keywords

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