How does temperature and density, how do you predict these two variables relate to air?

Density is the ratio of mass to volume and volume is based on the space between molecules. When temperature rises, molecules move faster and their spacing increases. The mass stays the same but its volume expands. So density goes down with temperature. Air is an example: that is how hot air balloon rises in air.

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation: