Geography (ozone depletion)

In 1980s,scientists discovered a hole int the ozone layer over

• America

• Antarctica

• Artic

• Australia

which gas is found over the surface of the earth?

• Nitrogen

• Oxygen

• Ozone

• Chlorofluorocarbons

chlorofluorocarbons are used in refrigerators and

(a)  

The ozone layer refers to a region of Earths ------------that absorbs most of the suns UV radiation.

• Stratosphere

• Thermosphere

• Exosphere

• Troposphere

Why are too many greenhouse gases bad for the environment?

• They cause trees to die.

• They release heat and will be the cause of the next ice age.

• They trap heat in our atmosphere causing the planet to warm up.

• They are fossil fuels which pollute our environment.

Effects of Ozone depletion are

• Effects on Materials

• Effects on Wind

• Effects on Water

• Effects on Human

-- are Ozone depleting substances

(a)