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Ch. 14 L2

Changing States of Matter

QuestionAnswer
What is a physical change? A change in which the form of a substance changes, but the substance still has the same chemical makeup.
What is density? The measure of how closely packed an object's atoms are.
What is a mixture? A combination of two or more different substances.
What is a solution? A mixture in which all the parts are mixed evenly.
How are melting and freezing points different? Melting is a change of state from solid to liquid. Freezing is a change of state from liquid to solid.
How are condensing and boiling alike? They occur at the same temperature
How can solid dry ice be made from carbon dioxide gas? By making it very cold.
What are snow and frost? Solid forms of water.
How do melting points of snow and frost compare with the melting point of ice? They are the same.
How are deposition and sublimation alike? Both are changes in state between a solid and a gas without going throught the liquid state.
How are melting a freezing alike? Both involve a change of state between a solid and a liquid.
How are condensing and boling different? Condensing is a change in state from gas to liquid. Boiling is the opposite--from liquid to gas.
What is sand combined with water? A mixture
What is sugar combined with water? A solution
What is another way that sugar can be separated from water? The mixture can be separated by leaving it in a warm place. The water evaporates, leaving the sugar in the container.
What is the easiest way to separate a water and sand mixture? By using some sort of filter.
How is a solution different from a mixture? A solution is one kind of mixture. All the parts are mixed evenly in a solution.
How are all physical changes alike? Physical changes affect the form of a substance but do not change the chemical make up (composition) of the substance.
Created by: s42mahoney
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