How do the components of a mixture differ from the components of a pure substance?

A mixture contains many elements, while a pure substance consists of only one element.

Explanation:

the answer is false because not all countries have geysers under their crust. for example, iceland uses geothermal energy because it is available every in their country.  

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.