Water and its importance Worksheet-1

Water and its importance Worksheet-1

 

Multiple -Choice Question:

  1. How much of the Earth’s surface is covered by water?

(a) 75%                (b) 50%                (c) 65%                (d) 81%

 

  1. What percentage of the world’s water supply is fresh?

(a) 2.5%               (b) 7.5%               (c) 10%                (d) 20%

 

  1. How many percent of the world water is suitable for human use?

(a) 25%                (b) 10%                (c) less than 1%  (d) 40%

 

  1. Water that is safe to drink is called:

(a) Tap Water                                   (b) Potable water

(c) Distilled water                            (d) Piliated water

 

  1. What proportion of the world’s major rivers are polluted or depleted?

(a) 10%                (b) 25%                (c) 50%                (d) 75%

 

  1. Which of these countries use most water per person per year?

(a) Russia             (b) India               (c) Egypt              (d) Germany

 

  1. What is the main source of water pollution in India?

(a) Municipal sewage

(b) Bathing in rivers

(c) Industrial discharge

(d) Both municipal sewage and industrial discharge

 

  1. Which of the following cultural practices help to conserve water? 

(a) Providing more space to plants

(b) Adding organic matter to the soil

(c) Using 3-4 inches (after settling) of organic mulch around plants

(d) All of these

 

  1. Gray water is recommended for watering gardens.  What is it?

(a) Collected rain water                  (b) Rainwater from gutters

(c) Unchlorinated water                 (d) Leftover household water 

 

  1. Rainwater collected after 30 to 40 minutes of raining is not suitable for drinking because it:

(a) is acidic                                        (b) contains dissolved toxic chemicals

(c) is deficient in minerals             (d) contains bacteria and dirt

 

Answer Key:

  1. (a)
  2. (a)
  3. (c)
  4. (b)
  5. (c)
  6. (c)
  7. (d)
  8. (d)
  9. (d)
  10. (d)