Ultraviolet Radiation and Ozone Layer

What is the most important compound in the stratosphere?

Answer explanation

The most important compound in the stratosphere is ozone (O3). It absorbs harmful ultraviolet (UV) radiation from the sun, protecting living organisms on Earth and playing a crucial role in the atmosphere's chemistry.

What are the potential effects of increased UV-B radiation?

• Skin cancer

• Cataracts

• Immune system damage

• Possible crop and marine life damage

• DNA damage

What is the role of ozone in the stratosphere?

Answer explanation

Ozone in the stratosphere plays a crucial role by absorbing the majority of the sun's harmful ultraviolet (UV) radiation, protecting living organisms on Earth from its damaging effects.

What is the Chapman cycle?

Answer explanation

The Chapman cycle describes the series of reactions that produce and destroy ozone in the stratosphere, primarily involving UV radiation, oxygen, and ozone itself, crucial for understanding atmospheric chemistry.

What is the average concentration of ozone in the atmosphere measured in?

• Dobson Units

• Parts per million

• Micrograms per cubic meter

• Atmospheric pressure

What is the average concentration of ozone in the atmosphere measured in Dobson Units?

• 200 Dobson Units

• 300 Dobson Units

• 400 Dobson Units

What are CFCs designed to be?

• Chemically reactive

• Chemically inert

• Toxic

What happens to CFCs when they reach the stratosphere?

• They are destroyed

• They remain unchanged

• They become reactive

What is the Ozone Depletion Potential (ODP) of CFC-11?

• 0.82

• 1.0

• 0.9

What is the main purpose of the Montreal Protocol?

• To increase CFC production

• To protect the stratospheric ozone layer

• To promote greenhouse gases