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Science Vocab. 4

Boiling Point The temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid
Buoyancy ability of a fluid--a liquid or a gas--to exert an upward force on an object immersed in the fluid
Diffusion spreading of particles throughout a given volume until they are uniformly distributed
Heat of Fusion amount of energy required to change a substance from the solid phase to the liquid phase
Heat of Vaporization the amount of energy required for the liquid at its boiling point to become a gas
Kinetic Theory explanation of the behavior of molecules in matter; states that all matter is made of constantly moving particles that collide without losing energy
Melting Point temperature at which a solid begins to liquefy
Pascal SI unit of pressure
Plasma matter consisting of positively and negatively charged particles
Pressure amount of force exerted per unit area; SI unit is the pascal
Thermal Expansion increase in the size of a substance when the temperature is increased
Viscosity a fluids resistance to flow
Created by: 51179