What term describes areas where air molecules are pressed together in sound waves?

The term that describes areas where air molecules are pressed together in sound waves is "compressions." In sound waves, which are longitudinal waves, molecules of the medium oscillate back and forth along the direction of the wave. When these molecules are pushed closer together, it creates a region of higher pressure known as a compression. These compressions alternate with areas where the molecules are spread further apart, known as rarefactions, which are the areas of lower pressure. This alternating pattern of compressions and rarefactions is what allows sound to travel through various media, including air. Understanding compressions is essential for grasping how sound waves propagate and how they interact with different environments.