Ozone is:
a. A colourless, inert gas
b. A poisonous, blue gas
c. A poisonous powder
d. None of the above
       
The ozone layer is located:
a. In the troposphere
b. Close to the Earth's surface
c. In the stratosphere
d. In the thermosphere
       
The ozone layer over Europe has deteriorated by:
a. 8 percent
b. 16 percent
c. more than 25 percent
d. It has not declined.
       
The following chemical substances are included in the list of the ozone depleting substances (ODS):
a. Freon - used in cooling technologies and refrigerators
b. Halons - used in fire-extinguishers
c. Various solvents and pesticides
d. All of the above
       
Once released in the atmosphere, the ODS rise slowly and begin disintegration of the ozone layer on contact. One molecule of ODS causes the destruction of:
a. 1000 ozone molecules
b. 10,000 ozone molecules
c. 100,000 ozone molecules
d. 1,000,000 ozone molecules
       
The major consequences of ozone-layer thinning is the increase of ultraviolet (UV) sun radiation, which can cause:
a. Cancer
b. Cataracts
c. Weakened human immune system
d. All of the above
       
Some individual risk factors for skin cancer are:
a. Fair skin and a tendency to burn rather than tan
b. Blue, green or hazel eyes, and light-colored hair
c. Many moles and freckles
d. All of the above
       
The world community has taken measures to protect the ozone layer by:
a. Gradually decreasing the use of ozone depleting substances
b. Increasing penalties for offenders
c. Producing more ozone artificially
d. Vaccinating people with higher risk for skin cancer
       
Despite all international measures already taken, the ozone layer will be critically thinned in the next:
a. 2-3 years
b. 10-15 years
c. 60-70 years
d. 100 years
       
Especially in the summer, you can help protect yourself from UV radiation by:
a. Wearing sunglasses and covering your skin up with protective clothing
b. Taking appropriate medicines
c. Getting a tan and keeping it
d. Going into the forest
       
Small children are extremely sensitive to UV radiation. Which of the following protective steps could be useful?
a. Keep infants of less than 12 months in the shade, and limit children's time in the midday sun
b. Cover up with protective clothing, a hat and sunglasses
c. Avoid sunlamps and tanning parlours
d. All of the above
       
You, as a consumer, can also help by choosing only "ozone friendly" goods. Look for labels that say:
a. Ozone friendly
b. Freon free
c. CFC free
d. All of the above
       


 
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