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28 Cards in this Set
- Front
- Back
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Physical change |
Alters the form of an object without changing what type of matter it is |
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Temperature |
Changes occur when an object gains or loses heat |
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Sublimation |
The change of a state directly from a solid to a gas |
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Closer together, denser |
Particles draw_________ as they lose heat so solids are usually ________ than liquids |
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Less, farther apart, solid arrangement |
Ice is _____ denser than liquid water because just before freezing, water molecules move _____ and line up in a ______. |
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Melting point |
The temperature at which a substance melts |
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Boiling point |
The temperature at which a substance boils |
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Freezing point |
The temperature at which a substance freezes |
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0 degrees Celsius |
What is the freezing point of water? |
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100 degrees Celsius |
What is the boiling point of water? |
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Thermal expansion |
The increase in an object’s volume due to a change in heat |
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Thermal contraction |
The decrease in an object’s volume due to a change in heat |
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Mixture |
A physical combination of a substances |
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Heterogeneous |
Mixtures that have different parts |
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Suspension |
A heterogeneous mixture which looks smooth because it has particles that float in a liquid but will eventually settle out |
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Colloid |
A mixture in which particles are so small that they do not settle out |
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Solution |
A homogenous mixture with parts that blend together so that it looks the same everywhere |
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Solute |
The smaller amount that is dissolved in a solution |
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Solvent |
The larger amount that dissolves the other substance |
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Alloy |
A solution of a metal and another solid (often a metal) |
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Solubility |
The maximum amount of a solute that can dissolve in a solvent |
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Temperature |
Solubility often depends on this |
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Water |
The universal solvent because it can dissolve many things |
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Distillation, chromatography |
Two methods of separating liquids are ___ and ___ |
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Distillation |
The process of separating liquids by using evaporation and condensation |
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Colloid |
I am smoke, cheese, and foam. I am a mixture that does not settle out. |
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Solute |
I am the sugar in sugar water. |
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Alloy |
I am steel and brass. |
