Available Answers

1. 1.

   Multiple Choice Questions (MCQs). Tick (√) the right option:

   1. ________________ means the presence of harmful substances in air, water and land.
      1. Population
      2. Pollution
      3. Water
      4. None of these
   2. The _______________ from vehicles and factories is released in to the air make it dirty.
      1. Poison
      2. Carbon-dioxide
      3. Smoke
      4. None of these
   3. Soil pollution makes the soil __________________.
      1. Fertile
      2. Infertile
      3. Soft
      4. None of these
   4. ________________ affects the growth of plants.
      1. Air pollution
      2. Water pollution
      3. Soil pollution
      4. None of these
   5. Pollutants are _______________ substances.
      1. Useful
      2. Harmful
      3. Clean
      4. None of these
2. 2.

   Fill in the blanks with the given words:

   smoke

   ozone

   smoke

   pollution

   harmful

   1. Wastes from factories cause water _______________________.
   2. Burning of fuels produces _________________ that causes air pollution.
   3. The _________________ from vehicles and factories is released into the air make it dirty.
   4. Acid rain contains _________________ gases.
   5. ___________________ layer protects us from harmful rays of the sun.
3. 3.

   Write 'T' for true or 'F' for false:

   1. We have always behaved in a responsible manner towards our environment.
   2. Increase in the temperature of water makes it unfit for aquatic life-forms.
   3. There is no change in the amount of snow covering the mountains.
   4. We should use eco-friendly fuels like CNG in vehicles.
   5. Rain water does not contain any pollutants.
   6. Landfills do not cause soil pollution.
4. 4.

   Define pollution.

5. 5.

   How we have polluted the air, water and soil of the earth?

6. 6.

   What is global warming? Give an example of a place affected by global warming.