The hole in the ozone layer

The gas ________ is a special kind of oxygen.

• CFCs

• ultraviolet radiation

• ozone

High in the atmosphere the _________ protects us from the harmful _________ from the sun.

• cloud layer, rain
• ozone, CFCs

• ozone layer, ultraviolet radiation

In the 1980s, scientists discovered a hole in the ozone layer caused by _________.

• Chlorofluorocarbons

  (CFCs)

• ozone layer

• Deforestation

Man-made chemicals that were once used in aerosols and refrigerators. ___________

• PVCs
• HFCs
• CFCs

A special kind of oxygen with three atoms in each molecule instead of two. _____________

• Ozone
• Carbon dioxide

• Nitrogen

Invisible rays from the sun that can damage the skin. ___________

• Gamma rays
• Ultraviolet radiation

  (UV ray)

• X-ray rays

A layer of gas high in the atmosphere that blocks ultraviolet radiation from the sun. __________

• nitrogen layer
• carbon layer
• ozone layer

Which one of the following is an ozone molecule?

• 
• 

The hole in the ozone layer has been caused by pollution from the power stations and cars.

• False

• True

The hole in the ozone layer has been caused by the pollution from spray cans and refrigerators.

• True

• False