🔍 Key Concepts

• Relative humidity and what 100% relative humidity means • How temperature affects the amount of moisture air can hold • Difference between heating/cooling air and adding/removing moisture

💭 Think About

• Ask yourself: When we say air can’t hold any more water vapor at a certain temperature, what word do meteorologists use? • Think about which option describes a "full" condition versus a process that is happening (like changing temperature or phase). • Which choice is a state of the air, and which are actions or processes (like water changing from liquid to vapor or vapor to liquid)?

✅ Before You Answer

• Identify which option describes air that is holding the maximum possible water vapor at that temperature. • Eliminate choices that describe phase changes (liquid to vapor, vapor to liquid) rather than a moisture "full" condition. • Confirm that the correct term is commonly used with relative humidity = 100% in basic weather and marine forecasts.