Flashcards in Chapter 1 - The Air We Breathe Deck (23):
What is the composition of our air?
1. Nitrogen (78%)
2. Oxygen (21%)
--> other 1% made up of argon, carbon dioxide, water vapor etc
What are percents per volume?
What are the "bad" gases?
1. Carbon Monoxide (CO)
2. Ozone (O3)
3. Sulfur Dioxide (SO2)
4. Nitrogen Dioxide (NO2)
5. Particulate Matter (PM)
What is the EPA's Air Quality Index?
shows level of health concern in air by color on a scale
-regional events like forest fires or volcanic eruptions can influence air quality
What is a mixture?
physical combination of 2 or more substances present in variable amounts, can be broken down physically
Make up of Inhaled Air vs. Exhaled Air
Inhaled: 78% nitrogen, 21% oxygen, .9% argon, .04 CO2
Exhaled: 78% nitrogen, 16% oxygen, .9% argon, 4% CO2
What are the bad gases?
Carbon Monoxide (CO)
Nitrogen Dioxide (NO2)
Sulfur Dioxide (SO2)
Particulate Matter (PM)
"silent killer" - no color, taste, or smell
-sources: automobiles, charcoal grills
-enters bloodstream and interferes with ability of your hemoglobin to carry oxygen
-can reduce lung function
-at high altitudes --> filters UV light (good)
-can combine with moist lung tissue to form an acid
-formed in anything that's hot (vehicle engines, coal-fired coal plants)
-sharp unpleasant odor
-dissolves in moist lung tissue to form acid
-cause: burning coal
-mix of tiny solid particles and microscopic liquid droplets
-classified by size over composition
-cause: vehicle engines, coal-burning power plants, wildfires, and blowing dust
-often visible as soot or smoke
What is a compound?
matter that can't be physically broken down, only chemically
What is an element?
matter that can't be broken down physically or chemically
What is a pure substance?
matter that can't be broken down physically
What are the rows of the periodic table called?
What are the columns of the periodic table called?
change atoms --> ______
change number --> ______
change arrangement --> _________
Source of Sulfur Trioxide
coal + O2 --> SO2
2SO2 + O2 --> 2SO3
Source of Nitrogen Oxides
N2 + O2 + high temp --> 2NO (nitrogen oxide)
2NO + O2 --> 2NO2