Fact sheets

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Environment Canada's 1999 Ozone Quiz

September 16, 1999, marks the 12th anniversary of the signing of the Montreal Protocol,the first international agreement to regulate the use of substances that deplete the ozone layer. To mark the occasion, Environment Canada has designed a quiz to test your knowledge about the ozone layer and its importance.

The ozone in the earth's atmosphere screens out:
space dust
meteors
UV radiation from the sun
smog
What part of the atmosphere contains the ozone layer? i.e. - where is most of the ozone?
troposphere (0-15 km)
stratosphere (15-50 km)
mesosphere (50-80 km)
thermosphere (above 80 km)
Where was the ozone hole discovered?
Arctic
Russia
Australia
Antarctic
Emissions of CFCs are responsible for the greatest share of ozone layer depletion. From the choices below, pick FOUR (4) uses of CFCs.
refrigeration
fuel additives
solvents
pesticides
air conditioning
power generation
foam generation
iron production
By how much has the ozone layer over Canada thinned since 1970?
0-5%
5-10%
10-15%
15-20%
Some surfaces can reflect a significant amount of UV radiation back onto your skin. Out of the following, which surface reflects the most UV?
concrete
water
asphalt
sand
fresh snow
You can protect yourself from too much exposure to UV radiation by t aking two of the following precautions. Which two?
wear sunscreen with both UVA and UVB protection
wear clothing to prevent UV radiation from penetrating your skin
eat lots of fresh fruit
avoiding sunlight during peak UV hours
exercise regularly
UV radiation is only dangerous during summer months.
true
false
During which hours should people stay out of the sunlight?
1 p.m. - 3 p.m.
10 a.m. - 1 p.m.
11 a.m. - 4 p.m.
8 a.m. - 8 p.m.
Which of the following health-related concerns are associated with exposure to dangerous UV radiation?
67,000 new cases of skin cancer in 1998
cataracts and other forms of eye damage
immune system deficiencies
all of the above
During which season is ozone depletion the most severe in Canada?
summer
winter
spring
fall
In marine ecosystems, UV radiation can damage the tiny single-celled plants known as phytoplankton (which form the basis of the food chain).
true
false
Although the production of ozone depleting CFCs is being controlled by the Montreal Protocol, CFCs are still found in certain products in many industrialized countries. Which of the following two may contain CFCs?
metered dose inhalers
office equipment
medical anesthetics
coolants in older refrigerators and air conditioners
Which type of skin cancer is most likely to be fatal?
melanoma
non-melanoma
In April of each year, Environment Canada issues a forecast for the average thickness of the ozone layer over Canada during the spring and summer months. In 1999, the forecast was 1-5% less than normal. The actual value was close to:
1%
3%
5%
10%
In 1999, what was the highest UV Index value recorded in Canada by Environment Canada?
15.5 in Windsor in August
9.4 in Toronto in early July
7.0 in Edmonton in May
4.0 in Resolute Bay in July

Meteorological Service of Canada - Environment Canada - Government of Canada

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Important Notices and Disclaimers

Created : 2002-09-18

Modified : 2004-03-05

Reviewed : 2004-03-05

Url of this page : http://www.msc.ec.gc.ca
/cd/factsheets/ozone/quiz1999/index_e.cfm

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