Warm-Up Ozone Depletion Questions
hydrogen
A second category of refrigerants currently available is the hydrochlorofluorocarbons (HCFCs). Although they contain chlorine, which is damaging to the ozone layer, they also contain_________, which makes them chemically less stable once they enter the atmosphere.
they are chemically very stable
CFCs are able to reach the stratosphere because ________.
hydrogen
CFCs are chemically very stable because they contain no ____.
Stratospheric
CFCs are damaging to the __ ozone layer.
HFC
CHF₂CF₃ refrigerant is a _____.
stratospheric
Capturing and ultimately eliminating the use of chlorofluorocarbons is being done in the United States to stop damage to the _____ ozone layer.
chlorine, fluorine, and carbon
Chlorofluorocarbons (CFCs) consist of ___, ___, and __ .
zero ODP
HFC fluorocarbon refrigerants cause no harm to the stratospheric ozone, they have ______.
CFCs
Of the three common types of refrigerants _____ has the highest high ozone-depletion potential (ODP)
a harmful pollutant
Ozone at ground level is ____.
3
Ozone in the stratosphere consists of molecules containing __ oxygen atom(s).
ultraviolet
The ozone layer absorbs and scatters ____ light from the sun, which prevents harmful amounts from reaching the earth.
HFCs
Refrigerants which contain no chlorine at all are called ______.
chlorine monoxide
The existence of ____ in the upper stratosphere indicates that the ozone layer is being destroyed.
more
When ozone depletion occurs, ______UV radiation penetrates to the Earth's surface.
c. R22
Which is an HCFC? a. R134a b. R12 c. R22 d. R113
Chlorine
____ in refrigerants causes ozone destruction.
Skin cancers, cataracts, and reduced crop yields
_____ are a result of damage to the Earth's ozone layer.
Bromine
______ containing compounds, which are contained in typical Halon fire extinguishers, also destroy the ozone.
Halocarbon
_________ is a halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine.
Chlorofluorocarbons, Hydrychlorofluorocarbons, and Halons
__________ are controlled by the Montreal Protocol