Question 4 Multiple Choice Worth 3 points) (02.03 LC)
Which physical factor, related to the formation of severe weather, has to do with the amount of water vapor in the air?
O Humidity
O Pressure
O Temperature
O Wind
Question 5/Multiple Choira Worth 2 nointel
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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds