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Intro. to I.S.

michelle-pnhs-intro to I.S. vocab

QuestionAnswer
What is a solid? the state of matter in which materials have a definite shape and a definite solid.
What is a liquid? the state of matter in which a material has a definite volume but not a definite shape.
What is a gas? the state of matter in which a material has neither a definite shape nor a definite volume.
What is kinetic energy? the energy an object has due to motion.
What is the kinetic theory? The kinetic theory of matter says that all particles of matter are in constant motion.
What is the kinetic theory of gas? The constant motion of particles in a gas allows a gas to fill a container of any shape or size.
What is the behavior of liquids? A liquid takes the shape of its container because particles in a liquid can flow to new locations. The volume of a liquid is constant because forces of attraction keep the particles close together.
What is the behavior of solids? Solids have a definite shape because particles in a solid vibrate around fixed locations.
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 are the six common phase changes? Melting, freezing, vaporization, condensation, sublimation, and deposition.
Temperature and phase changes. The temperature of a substance does not change during a phase change.
Energy and phase changes. Energy is either absorbed or released during a phase change.
What is an endothermic change? A change when the system absorbs energy from its surroundings.
What is the heat of fusion? The amount of energy absorbed depends on the substance. This amount of energy is the heat of fusion for water. Fusion is another term for melting.
What is an exothermic change? A change when the system releases energy to its surroundings.
What is vaporization? The phase change in which a substance changes from a liquid to a gas.
What is the heat of vaporization? This amount of energy is the heat of vaporization. The heat of vaporization varies from substance to substance.
What is evaporation and where does it take place? Evaporation is the process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point. It takes place at the surface of a liquid.
What is condensation? The phase change in which a substance changes from a gas to or vapor to a liquid.
What is sublimation? 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? When a gas or vapor changes directly into a solid without first changing to a liquid.
Created by: mroth19
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