Ozone WebQuest

What are CFCs made of?

• Nitrogen, hydrogen, and carbon

• Carbon, chlorine, and fluorine

• Oxygen, chlorine, and fluorine

• Carbon, hydrogen, and oxygen

Why were CFCs initially used in refrigerators?

• Because they were abundant

• For their flammability

• Due to their low cost

• Because they were non-toxic

Who first synthesized CFCs?

• Joe Farman

• Thomas Midgley, Jr.

What significant environmental treaty was signed to reduce substances that deplete the ozone layer?

• The Kyoto Protocol

• The Paris Agreement

• The Montreal Protocol

What are HCFCs and HFCs used for?

• As new forms of refrigerants

• As substitutes for CFCs

• For cleaning solvents

• All of the answer choices are correct

What does the Montreal Protocol aim to eliminate by the year 2030 in non-article 5 nations?

• The production of CFCs

• The consumption of HCFCs

Tags

NGSS.HS-LS2-7

What gas is currently the most significant remaining threat to future ozone levels?

• Chlorine

• Nitrous oxide

What was the main reason for the development of CFCs?

• To create a cheaper product

• To find a safer refrigerant

What is the expected time frame for the recovery of the stratospheric ozone layer to pre 'Ozone Hole' levels?

• Between 2040 and 2080

• Between 2100 and 2150

What was the role of the Microwave Limb Sounder (MLS) instrument?

• To monitor stratospheric inorganic chlorine

• To observe marine life