Why does atumn start in diffrent months of the year in north america and south america

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.