When air molecules are warm, what general effect does this have on both air density and atmospheric pressure?

Question

Accepted Answer

Density decreases, and pressure decreases because the gas expands.. When gas molecules are warm, they move vigorously and take up more space. According to Source 2: "With the same number of molecules in less space, both air density and air pressure are higher. When gas molecules are warm, they move vigorously and take up more space. Air density and air pressure are lower. "