The _________ of a material is defined by the equation density = mass / volume - density, The density of a material is defined by the equation density = _____ / ________ - mass/volume, When substances change state (melt, freeze, boil, evaporate, condense or sublimate), mass is c_________. - conserved, When substances change s_____ (melt, freeze, boil, evaporate, condense or sublimate), mass is conserved. - state, Energy must be t__________ to a substance to make it change state. - transferred, This energy is then used to overcome the interm_________ f_________ between the particles. - intermolecular forces, E__________ occurs from the surface of a liquid when its temperature is below its boiling point. - Evaporation, Evaporation occurs from the surface of a liquid when its temperature is below its b______ p______. - boiling point, Changes of s_____ are physical changes which differ from chemical changes because the material recovers its original properties if the change is reversed. - state, Changes of state are ph_______ changes which differ from chemical changes because the material recovers its original properties if the change is reversed. - physical, Changes of state are physical changes which differ from chemical changes because the material recovers its original properties if the change is r__________. - reversed, A chemical change involves the r__________ of particles and creating a different substance. - rearranging, A chemical change involves the rearranging of particles and creating a different s___________. - substance, A physical change involves the i_____/r_______ of energy from a substance to create a state change. - input/removal, A physical change involves the input/removal of e_______ from a substance to create a state change. - energy, The __________ of a gas are in constant random motion (Brownian motion) - molecules, The molecules of a gas are in constant random motion (B_________ motion) - Brownian, The t___________ of the gas is related to the average kinetic energy of the molecules. - temperature, The temperature of the gas is related to the average k________ e________ of the molecules. - kinetic energy, Changing the temperature of a gas, held at constant volume, changes the p__________ exerted by the gas. - pressure, The v________ of the gas increases as the temperature increases. - volume, Gas pressure is caused by gas p__________ hitting the wall of their container - particles, Gas pressure is caused by gas particles hitting the w____ of their c___________ - wall of their container, G____ particles are hitting you, right now! - Gas, Gas pressure can increase by: Increasing the t___________ - temperature, Gas pressure can increase by: Decreasing the size of the c________ - container, Gas pressure can increase by: Increasing the number of gas p__________ in the container - particles,

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