Available Answers

1. 1.

   What is being depicted in the given picture? What steps should be taken to prevent the problem?

   

2. 2.

   Fill in the blanks.

   1. The _______________ gas causes global warming.
   2. Air pollution causes _______________ problems.
   3. Carbon dioxide in air is used up by _______________.
   4. Acid rain contains traces of _______________.
   5. Smog is a combination of _______________ and _______________.
3. 3.

   Tick (√) the correct option.

   1. Air pollution is caused due to
      1. burning of fuels
      2. acid rain
      3. sewage
      4. industrial waste
   2. Which of the following is the effect of global warming?
      1. Melting of polar ice caps
      2. Soil erosion
      3. Destruction of marble
      4. None of the above
   3. Which of these causes ozone layer depletion?
      1. Carbon dioxide
      2. Carbon monoxide
      3. Chlorofluorocarbons
      4. All of the above
   4. The less polluting fuel among the following is
      1. petrol
      2. diesel
      3. kerosene
      4. compressed natural gas (CNG)
   5. Renewable source of energy is
      1. solar energy
      2. petrol
      3. coal
      4. CNG
4. 4.

   Write two examples for each of the following.

   1. Acids that constitute acid rain
   2. Chemical that can be added to purify water
   3. Air pollutants
   4. Methods to purify water
   5. Water pollutants
5. 5.

   Match the columns.

   COLUMN A	COLUMN B
   1. Methane	a. Respiratory diseases
   2. Poisonous gas	b. Supports life
   3. Particulate matter	c. Greenhouse gas
   4. Oxygen	d. Acid rain
   5. Nitric acid	e. Carbon monoxide

    

6. 6.

   Differentiate between global warming and acid rain.