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7 Cards in this Set
- Front
- Back
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Which type of air can hold more water vapor...cold air or warm air?
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Warm air can hold more water vapor than cooler air.
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How does air pressure effect the amount of water vapor that air can hold?
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Air under low pressure holds more water than air under higher pressure.
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What makes clouds?
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Clouds are composed of tiny droplets of condensed liquid water. The droplets form (make) visible clouds and fog.
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What happens when pressure is reduced on a gas?
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*When pressure is reduced on a gas, it expands.
*Then, fewer collisions between gas molecules occus. *Fewer collisions result in decreased temperature. |
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What happens when gas is compressed into a smaller volume?
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*When gas is compressed into a smaller volume, or when more gas molecules are forced into a given volume, more collisions occur. This results in increased temperature.
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What happens when water vapor transfers energy to its surroundings?
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When water vapor transfers energy to its surroundings, vapor can condense to form liquid water. When water vapor comes into contact with a cold surface, energy transfers to the cold surface, and droplets of liquid water form there.
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Explain what occurred during the class experiment when you put water droplets on the back of your hand.
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The wet spot felt cooler. Heat energy from your hand transferred to the water molecules. Increased energy made the water molecules move faster. The fast moving molecules evaporated. Heat that was in your hand changed liquid water into water vapor. The flow of heat away from your hand was sensed as cold.
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