🔍 Key Concepts

• Relative humidity vs capacity of air to hold water vapor • Effect of temperature on the maximum amount of water vapor air can contain • Difference between hot and cold air in terms of saturation point

💭 Think About

• If you warm a given sample of moist air without adding or removing water, what happens to its relative humidity? • Why do warm, tropical regions often feel more humid than polar regions? What does that say about how much moisture warm air can contain? • Think about dew and fog: under what temperature conditions does air reach saturation more quickly, warm or cold?

✅ Before You Answer

• Be clear on the difference between actual moisture present and maximum moisture the air can hold • Consider how dew point relates to air temperature and moisture capacity • Eliminate any choice that says temperature has no effect on air’s moisture capacity