scarpino- pnhs- intro to I.S. vocab

Question Answer
what is a solid? a solid is the state of matter in which materials have a definite shape and a definite volume.
what is a liquid? a liquid is the state of matter in which a material has a definite volume but a variable shape.
what is a gas? a gas is the sate of matter in which a material has a variable shape and variable volume.
what is kinetic energy? kinetic energy is the energy an object has due to motion.
what is a phase change? a phase change is the reversible physical change that occurs when a substance changes from one state of matter to another.
what happens during an endothermic change? during an endothermic change, the system absorbs energy from it's surroundings.
what is heat of fusion? heat of fusion is the amount of energy. the fusion is another term for melting. the heat of fusion varies from substance to substance.
what happens during an exothermic change? during an exothermic change, the system releases energy to its surroundings.
what is vaporization? vaporization is the phase change in which a substance changes from a liquid into a gas. (endothermic change)
what is heat of vaporization? heat of vaporization is the amount of energy on the water. it varies from substance to substance.
what is evaporation? the process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point.
what is vapor pressure? vapor pressure is pressure caused by the collisions of this vapor and the walls of the container.
what is condensation? condensation is the phase change in which a substance changes from a gas or vapor to a liquid.
what is sublimation? sublimation is the phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first.
what is deposition? deposition is when a gas or vapor changes directly into a solid without changing into a liquid.

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