Why is more atmospheric pressure at lower altitudes than at higher altitudes? remember, use the website link to try and answer the question...

What are the three main components to the atmosphere along with their percent concentration?

Why do living things need oxygen, nitrogen, and carbon dioxide?

What is "particulate matter", and give several examples of particulate matter in the air we breathe?

If living organisms use oxygen and nitrogen, how is it possible that the concentration of each of these gases is maintained at a constant level?

Free question: Why do you think God created such a cycle of gas and particles in the atmosphere?