Term
| During evaporation, a liquid changes phase at its ___________ and becomes a gas. |
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Definition
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Term
| Evaporation is a ____________ process. |
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Definition
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Term
| During condensation, a gas changes phase and becomes a _____________. |
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Definition
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Term
| Condensation is a ____________ process. |
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Definition
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Term
| At the same relative humidity, there is more ________ ________ in warm air than in cold air. |
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Definition
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Term
| ______________ and _________ form when air cools and is unable to contain as much water vapor. |
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Definition
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Term
| What happens to a liquid’s volume when evaporation and condensation occur at the same rate? |
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Definition
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Term
| A liquid is in equilibrium when the surrounding air is ____________ with its vapor. |
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Definition
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Term
Water evaporates much faster than it condenses in:
A.) dry air
B.) humid air |
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Definition
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Term
| A liquid can change phase at/below/at and below the surface. |
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Definition
| at and below, during boiling, a liquid changes phase at any place within the liquid and gas bubbles form. |
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Term
| ______________at a liquids surface affects its boiling temperature. |
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Definition
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Term
| Boiling is a cooling _______________. |
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Definition
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Term
| During freezing, a liquid changes phase and becomes a ______________ |
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Definition
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Term
| You can ______________ the freezing temperature of a liquid by adding other substances to it. |
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Definition
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Term
| During phase changes energy is/is not given off. |
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Definition
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Term
| The temperature of a substance does/does not change drastically when it changes phase. |
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Definition
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Term
At which phase change is more energy given off:
A.) water vapor → water
B.) water → ice |
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Definition
| Much more energy is given off when water vapor condenses into water. |
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Term
| Name the three common phases of matter and the phase of matter in space. |
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Definition
| Solid, liquid, gas, plasma |
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Term
| A change of phase from liquid to gas that takes place at the surface of a liquid is ______. |
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Definition
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Term
| Why is evaporation and boiling considered “cooling” processes? |
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Definition
| The average KE of the molecules remaining is lower. |
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Term
| Why is “condensation,” considered a warming process? |
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Definition
| Kinetic energy lost by condensing gas molecules warms the surface they strike. |
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Term
| What does relative humidity indicate? |
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Definition
| How much water vapor is in the air that the air can hold at a certain temperature. |
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Term
| What do we mean when we say air is “saturated”? |
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Definition
| The air contains as much water vapor as it can at that temperature. |
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Term
| The changing of a gas to a liquid is called _____________________. |
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Definition
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Term
| When evaporation and condensation occur at the same rate the liquid is in ____________________________________ |
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Definition
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Term
| The change of phase from liquid to gas that occurs beneath the surface in the liquid is called ______________________________________ |
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Definition
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Term
| The change in phase from liquid to solid is called ______________________ |
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Definition
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Term
| Melting of water under pressure, removing the pressure and reformation of ice is called __________________________________ |
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Definition
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Term
| Why does it protect your finger to wet it before you put it on a hot iron? |
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Definition
| The energy goes into changing the phase of the liquid rather than vaporizing your finger. |
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