Question

the air in earths atmosphere is made up of molecules of gases like nitrogen and oxygen. when air is cool, its molecules are dense, or packed tightly together. when air is warm, it becomes less dense and rises, leaving behind a space with low pressure. cool, dense air rushes in to fill that space. the air rushing in is wind. eventually the warm air cools and sinks back down to earth, continuing a cycle that moves air and produces wind. which of the following best describes the relationship between air temperature and density? choose one option a when air temperature is stable, it becomes more dense. b as air gets cooler, it becomes less dense. c as air gets warmer, it becomes less dense. d air temperature cannot be used to predict air density.

Explanation:

The text states that when air is cool, its molecules are dense (packed tightly). When air is warm, it becomes less dense. So, as air gets warmer, density decreases. Option A is incorrect as stable temperature isn't related to increased density in the text. Option B is wrong as cooler air is more dense. Option D is incorrect as the text clearly shows a relation between temperature and density.

Answer:

C. As air gets warmer, it becomes less dense.