Chapter 1 - The Air We Breathe Flashcards Preview

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Flashcards in Chapter 1 - The Air We Breathe Deck (23):
1

What is the composition of our air?

1. Nitrogen (78%)
2. Oxygen (21%)
--> other 1% made up of argon, carbon dioxide, water vapor etc

2

What are percents per volume?

concentration

3

What are the "bad" gases?

1. Carbon Monoxide (CO)
2. Ozone (O3)
3. Sulfur Dioxide (SO2)
4. Nitrogen Dioxide (NO2)
5. Particulate Matter (PM)

4

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

5

What is a mixture?

physical combination of 2 or more substances present in variable amounts, can be broken down physically

6

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

7

What are the bad gases?

Carbon Monoxide (CO)
Ozone (O3)
Nitrogen Dioxide (NO2)
Sulfur Dioxide (SO2)
Particulate Matter (PM)

8

Carbon Monoxide

"silent killer" - no color, taste, or smell
-sources: automobiles, charcoal grills
-enters bloodstream and interferes with ability of your hemoglobin to carry oxygen

9

Ozone

-sharp odor
-can reduce lung function
-at high altitudes --> filters UV light (good)

10

Nitrogen Dioxide

-brown color
-can combine with moist lung tissue to form an acid
-formed in anything that's hot (vehicle engines, coal-fired coal plants)

11

Sulfur Dioxide

-sharp unpleasant odor
-dissolves in moist lung tissue to form acid
-cause: burning coal

12

Particulate Matter

-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

13

What is a compound?

matter that can't be physically broken down, only chemically

14

What is an element?

matter that can't be broken down physically or chemically

15

What is a pure substance?

matter that can't be broken down physically

16

What are the rows of the periodic table called?

periods

17

What are the columns of the periodic table called?

groups

18

change atoms --> ______

different molecule

19

change number --> ______

different molecule

20

change arrangement --> _________

different molecule

21

Source of Sulfur Trioxide

coal + O2 --> SO2
2SO2 + O2 --> 2SO3

22

Source of Nitrogen Oxides

N2 + O2 + high temp --> 2NO (nitrogen oxide)
2NO + O2 --> 2NO2

23

Source of Ozone

VOCs + NO + .OH --> NO2 + etc.
NO2 + light --> NO + O
O + O2 --> O3