Page 62 - Health & Physical edu- 8
P. 62
Summary
- The contamination of unwanted and harmful elements in the water which
reduce its quality is called water pollution.
- Water can be purified and made drinkable by boiling, filtering, adding
chemicals and using sodis method.
- The management of non-degradable solid waste materials can be effective
by reducing its production, reusing and recycling.
Exercise
1. Answer the following questions.
a. Write down the preventive measures of waterborne diseases.
b. What are the preventive measures of airborne diseases?
c. Write down the measures of managing solid wastes.
d. Explain the methods of purifying polluted water.
e. What are the bad effects of noise pollution?
f. Write down the causes of air pollution.
g. Write down the safety measures against the effects of noise pollution.
2. Draw the pictures of different methods for purifying water.
58 Health & Physical Education, Class-8
