Under standard atmospheric conditions, which...

Question 1 / 270705eccef9dbacbc34ba4d45ea2

Question 1 of 270705eccef9dbacbc34ba4d45ea2

Under standard atmospheric conditions, which of the following is true concerning the characteristics of air?

Question 1 of 27070

Under standard atmospheric conditions, which of the following is true concerning the characteristics of air?

🔍 Key Concepts

• Density of air and how water vapor affects it • Difference between absolute humidity and relative humidity • How temperature affects the air’s capacity to hold water vapor

💭 Think About

• Compare the molecular weights of dry air’s main gases (like nitrogen and oxygen) with water vapor. What happens to overall density when more water vapor is mixed in? • Think about what happens to the maximum amount of water vapor air can hold as temperature increases: does warm air or cold air hold more moisture? • If you take a fixed sample of air and heat it without adding or removing water vapor, what happens to its relative humidity: does it go up or down?

✅ Before You Answer

• Be clear on the difference between moist air vs. dry air density under the same temperature and pressure. • Verify how warmer air’s moisture capacity compares to colder air’s. • Remember that relative humidity is a ratio: actual moisture content divided by the maximum the air could hold at that temperature. Consider how that ratio changes when temperature alone increases.

Question 1 of 27070

Under standard atmospheric conditions, which of the following is true concerning the characteristics of air?

Dry air is heavier than moist air.

Dry air is lighter than moist air.

Cold air can hold more moisture than warm air.

Heating a sample of air will increase its relative humidity.

Question 1 / 270705eccef9dbacbc34ba4d45ea2

Question 1 of 270705eccef9dbacbc34ba4d45ea2

Under standard atmospheric conditions, which of the following is true concerning the characteristics of air?

Back

Question 1 of 27070

Under standard atmospheric conditions, which of the following is true concerning the characteristics of air?

🔍 Key Concepts

• Density of air and how water vapor affects it • Difference between absolute humidity and relative humidity • How temperature affects the air’s capacity to hold water vapor