Ozone Depletion

How do CFCs affect ozone production?

• UV radiation frees a chlorine atom, which breaks down ozone.

• Infrared radiation frees a chlorine atom, which breaks down ozone.

• UV radiation frees a fluorine atom, which breaks down ozone.

• Infrared radiation frees a chlorine atom, which breaks down ozone.

Tags

NGSS.HS-PS4-3

The breakdown of stratospheric ozone
I. can originate from the emission of chlorofluorocarbons (CFCs).
II. is catalyzed through a free chlorine (Cl) atom.
III. prevents UV rays from reaching the earth’s surface.

• I only

• III only

• I,&II

• I,II,& III

Tags

NGSS.HS-PS1-5

Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?

• Montreal Protoccol

• Kyoto Protoccol

• Paris Agreement

• Yo MaMa

Depletion of ozone layer is a concern because it normally absorbs ____% of the sun's UV radiation.

• 50

• 75

• 89

• 99

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

What is the primary cause of ozone depletion?

• Excessive CO2 emissions

• Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances

• Deforestation

• Volcanic eruptions

What is the main cause of ozone depletion?

• Carbon dioxide emissions

• Deforestation

• Chlorofluorocarbons (CFCs)

• Methane emissions

Which is NOT a result in the reduction of stratospheric ozone?

• reduced photosynthetic activity

• increased skin cancer

• increased eye problems

• increased birth defects

• suppressed immune systems

Ozone depletion in the Earth's atmosphere is mainly caused by:

• Excessive planting of trees

• Chlorofluorocarbons (CFCs) from aerosols and refrigerants

• The use of solar panels

• Increased carbon dioxide emissions from cars

When is the Antarctic ozone "hole" largest?

• early spring in southern hemisphere

• late summer in southern hemisphere

• mid summer in southern hemisphere

• late fall in southern hemisphere

• early winter in southern hemisphere

Tags

NGSS.HS-ESS2-4

What are some sources of CFCs when it comes to Ozone Depletion?

• Aerosols

• Refrigerants

• Decomposition

• all of the above