How does atmospheric pressure at sea level compare to the atmospheric pressure on the top of a mountain? Explain.

At the top of a mountain the molecules are less dense and there is less air pressure. While at sea level the molecules are more dense and there is more air pressure.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.