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H20 Vapor & Humidity

QuestionAnswer
Q: How does most water vapor enter the atmosphere? A: Evaporation
Q: What is the main source of water vapor? A: Oceans
Q: What is humidity? A: The amount of water vapor in the air
Q: What is relative humidity? A: The percentage of water vapor in the air compared to how much it can hold
Q: What does 100% relative humidity mean? A: The air is saturated
Q: What is dew point? A: The temperature at which condensation begins
Q: What happens when air reaches the dew point? A: Condensation occurs (clouds, dew, frost, or precipitation forms)
Q: What does a psychrometer measure? A: Humidity
Q: How many thermometers does a psychrometer have? A: Two
Q: What are the two thermometers called? A: Wet bulb and dry bulb
Q: Why is the wet bulb cooler? A: Evaporation cools it
Q: What does a large temperature difference between bulbs mean? A: Low humidity
Q: What are clouds made of? A: Water droplets or ice crystals
Q: What are condensation nuclei? A: Tiny particles that water vapor condenses onto
Q: What causes clouds to form? A: Rising air cools to the dew point and condenses
Q: What happens to air as it rises? A: It cools
Q: What are the three main cloud types? A: Stratus, cumulus, cirrus
Q: What are stratus clouds? A: Flat, low clouds that cover the sky
Q: What type of stratus cloud brings heavy precipitation? A: Nimbostratus
Q: What are cumulus clouds? A: Fluffy, cotton-like clouds
Q: What weather do cumulus clouds usually bring? A: Fair weather
Q: What are cumulonimbus clouds? A: Tall storm clouds that bring thunderstorms
Q: What are cirrus clouds? A: Thin, feathery clouds made of ice crystals
Q: Where are cirrus clouds found? A: High altitudes
Q: What do cirrus clouds often indicate? A: Weather may change soon (rain/snow coming)
Q: Explain how a cloud forms. A: Water evaporates, warm air rises and cools, reaches dew point, and condenses onto particles to form clouds
Created by: Elise43
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