CHY 599 Lecture Notes - Lecture 1: Nitrogen Dioxide, Ultraviolet, Sulfur Oxide
Document Summary
Atmosphere is the tin veil between the outer space and us. Human activities leave air prints that alter the composition of the atmosphere. Indoor air print: growing house plants, burning candles, applying paint. Green plants remove co2 and adds oxygen = good for humans. What"s in a breath? adults breathe 11,000 liters ( 3000 gallons) of air per day. Air is a mixture: a physical combination of to or more pure substances present in variable amounts. Pure substances that are major components of air: nitrogen, oxygen, argon, Composition of air changed depending on where you are ( small room, more pollution, dense area etc. ) Air we breathe is 78% nitrogen and 21% oxygen 1% other. Water vapor is colorless hence its invisible ( fog is not water vapor) Respiration food we eat are metabolized to produce carbon dioxide and oxygen is the most abundant in the human body water.