Available Answers

1. 1.

   Multiple Choice Questions.

   1. _______________ means the presence of harmful substances in air, water and land.
      1. Population
      2. Pollution
      3. Water
   2. The ____________ from vehicles and factories is released into the air making it dirty.
      1. Poison
      2. Carbon-dioxide
      3. Smoke
   3. Soil pollution makes the soil _______________.
      1. Fertile
      2. Infertile
      3. Soft
   4. _____________ affects the growth of plants.
      1. Air pollution
      2. Water pollution
      3. Soil pollution
   5. Pollution are ____________ substances.
      1. Useful
      2. Harmful
      3. Cleaned
2. 2.

   Fill in the blanks with the correct words from the box.

   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 in to the air making it dirty.
   4. Acid rain contains _____________ gases.
   5. _____________ layer protects us from harmful rays of the sun.
3. 3.

   Write T for the true statement and F for the false one.

   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 environment.

5. 5.

   Define pollution.

6. 6.

   What is acid rain?