Question 2
Fill in the blanks:
(a) ............... coming from the sun penetrates the atmosphere and is absorbed by the earth.
(b) Concentration of greenhouse gases has risen rapidly due to ............... .
(c) The oceans serve as a ............... for carbon dioxide.
(d) The degree at which water vapour is present in the air is called ............... .
(e) The ozone layer lies in the ............... between 16 and 50 km above the earth’s surface.
(f) Many ............... spray cans contain harmful chemicals called chlorofluorocarbons (CFCs).
(a) Ultraviolet radiation coming from the sun penetrates the atmosphere and is absorbed by the earth.
(b) Concentration of greenhouse gases has risen rapidly due to human activities
(c) The oceans serve as a sink for carbon dioxide.
(d) The degree at which water vapour is present in the air is called humidity
(e) The ozone layer lies in the stratosphere between 16 and 50 km above the earth’s surface.
(f) Many aerosol spray cans contain harmful chemicals called chlorofluorocarbons (CFCs).