Unit 4 Test Review

What three components have to be present to create photochemical smog?

• VOCS, PANS, Carbon Dioxide
• VOCS, Ozone, Nitrogen Monoxide
• Nitrogen Dioxide, Sunlight, and VOCS
• Sulfur Dioxide, Nitrogen Dioxide, and Ozone

This molecule prevents UV radiation from getting to the troposphere

• stratospheric ozone

• tropospheric ozone

• Calcium Carbonate

• CFC

a secondary pollutant

• forms in the stratosphere

• is transformed by sunlight, water, or other elements in the atmosphere

• cannot be directly tracked to its source

• forms primarily from incomplete combustion

Which is a source of sulfur dioxide found in nature?

• forest fires

• lightning

• plant emissions

• volcano

Thermal inversions

• increase the rate of smog formation

• trap high concentrations of pollution at ground level

• result in increased levels of acid deposition

• reduce the negative effects of VOC's

Which method is used to reduce the nitrogen oxide emissions

• installation of catalytic converters

• increased temperature of combustion

• the use of calcium carbonate to absorb the emissions

• the use of fluidized bed combustion

Which is NOT a criteria air pollutant?

• Sulfur dioxide

• lead

• carbon dioxide

• particulate matter

CFC's cause harm to our 

• Troposphere
• Inversion Layer
• Ozone Layer
• Carbon Dioxide

A colorless, odorless gas

• Nitrogen oxides
• Ground-level ozone
• Carbon monoxide
• Sulfur dioxide

A metallic element that can cause brain damage

• Lead
• Particulate matter
• Ground-level ozone
• Nitrogen oxides