IBESS 6.3 Photochemical Smog

Front

What is a primary pollutant?

Back

A primary pollutant is a substance that is put directly into the air by human activities.

Front

What is a catalytic converter?

Back

A catalytic converter is an air pollution prevention mechanism found in vehicles that helps reduce harmful emissions.

Front

What pollutants are responsible for photochemical smog?

Back

Volatile organic compounds (VOCs) and nitrogen oxides are the primary pollutants responsible for photochemical smog.

Front

What is the most important factor in a photochemical reaction?

Back

Sunlight is the most important factor in a photochemical reaction.

Front

List four characteristics of urban areas with high levels of photochemical smog.

Back

1. Located in a basin or surrounded by mountains 2. Calm winds 3. Dry weather 4. Sunny conditions 5. Many industries and vehicles

Front

What is photochemical smog?

Back

Photochemical smog is a type of air pollution that is formed when sunlight reacts with pollutants like VOCs and nitrogen oxides.

Front

How does temperature affect photochemical smog formation?

Back

Higher temperatures can increase the rate of photochemical reactions, leading to more smog formation.

Front

What role do volatile organic compounds (VOCs) play in air pollution?

Back

VOCs are organic chemicals that can evaporate into the air and contribute to the formation of photochemical smog.

Front

What is the relationship between sunlight and photochemical smog?

Back

Sunlight provides the energy needed for the chemical reactions that produce photochemical smog.

Front

What are nitrogen oxides and their role in air pollution?

Back

Nitrogen oxides are gases that contribute to the formation of smog and are produced from vehicle emissions and industrial processes.