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Year 7 HWK4

Year 7 Particles Homework

TermDefinition
Name a very tiny object such as an atom or molecule, too small to be seen with a microscope. Particle
Name a way to think about how substances behave in terms of small, moving particles. Particle model
What is the process by which particles in liquids or gases spread out through random movement from a region where there are many particles to one where there are fewer? Diffusion
What is caused by collisions of particles with the walls of a container? Gas pressure
What word describes how much matter there is in a particular volume, or how close the particles are? Density
What is a change from liquid to gas at the surface of a liquid, at any temperature? Evaporate
What is a change from liquid to a gas of all the liquid when the temperature reaches boiling point? Boil
What is a change of state from gas to liquid when the temperature drops to the boiling point? Condense
What is a change from solid to liquid when the temperature rises to the melting point? Melting
What is a change from liquid to a solid when the temperature drops to the melting point? Freezing
What is a Change from a solid directly into a gas? Sublime
Created by: Windypicks
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