6.3 Photochemical Smog

Question 1

Photochemical Smog

Answer 1

a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds react to sunlight

Question 2

Volatile Organic Compounds (VOCs)

Answer 2

• compounds that easily become vapours
• they may contain elements such as carbon, oxygen, hydrogen, chlorine, and sulfur

Question 3

Tropospheric Ozone

Answer 3

bad ozone that irritates organic life health and is a form of air pollutant

Question 4

What Causes Tropospheric Ozone

Answer 4

ozone is created through the interactions of man-made (and natural) emissions of volatile organic compounds and nitrogen oxides in the presence of heat and sunlight

Question 5

Primary Pollutants

Answer 5

pollution that is emitted directly from the polluting process

Question 6

Secondary Pollutants

Answer 6

pollution that is formed when primary pollutants undergo reactions with other chemicals already present in the atmosphere

Question 7

Examples of primary pollutants

Answer 7

• carbon dioxide
• carbon monoxide
• unburned hydrocarbons
• nitrogen oxides
• sulfur oxides
• particulate matter

Question 8

Examples of secondary pollutants

Answer 8

• tropospheric ozone
• particles produced from gaseous primary pollutants
• Peroxyacetyl nitrate (PAN)

Question 9

Management Strategy Types

Answer 9

Replace, Regulate, Restore

Question 10

Thermal Inversion

Answer 10

refers to an increase in temperature with height in the troposphere
- they occur due to a lack of air movement when a layer of dense , cool air is trapped beneath a layer of less dense, warm air

Question 11

What effects the accumulation of smog

Answer 11

• the intensity of the sunlight
• the speed of the wind
• the local topography
• the amount of fossil fuels burned
• the amount of regional vegetation
• deforestation and burning