Air Around Us_13

What is the ozone layer?

• A layer of oxygen atoms

• A layer of nitrogen oxide

• A layer of ozone gas

• A layer of carbon dioxide

What are UV rays?

• X-rays

• Ultraviolet rays

• Infrared rays

• Visible light rays

What are the harmful effects of UV rays?

• Increase in vitamin D production

• Decrease in skin cancer risk

• Decrease in cataract risk

• Increase in skin cancer risk

What is the ozone made up of?

• Four oxygen atoms

• Three oxygen atoms

• Two oxygen atoms

• One oxygen atom

What is deteriorating the ozone layer?

• Chlorofluorocarbons

• Methane

• Carbon monoxide

• Sulfur dioxide

What is the ozone hole?

• An actual hole in the ozone layer

• An area with less ozone

• An area with more ozone

• A layer of ozone gas

What is the size of the ozone hole?

• 10 million square kilometers

• 20 million square kilometers

• 30 million square kilometers

• 40 million square kilometers

How can we stop the depletion of the ozone layer?

• Encourage the production of harmful chemicals

• Reduce the production of harmful chemicals

• Increase the production of harmful chemicals

• Ignore the production of harmful chemicals

What are CFCs used in?

• Textile industry

• Refrigeration systems

• Agriculture

• Construction

What are nitrogen oxides a by-product of?

• Waste management

• Water purification

• Mining

• Fuel burning