Fill in each blank with the correct word from the lesson.

1. _______ is the most reliable method — one minute of boiling kills all bacteria and viruses.
2. _______ drinking water is one of the most important things a society can provide.
3. Two billion people around the world drink _______ that isn't safe — and it causes millions of deaths every year from diseases like cholera, typhoid, and diarrhoea.
4. Then _______ation tanks let heavy particles sink to the bottom.
5. Getting Clean Water is an important topic in _______.

Choose the best option for each question.

1. What does chlorination do in water treatment?
   a) Removes large debrisb) Makes water taste betterc) Kills bacteria and virusesd) Removes sand particles
2. Which home water purification method kills ALL bacteria and viruses?
   a) Filtering through clothb) Leaving it in sunlightc) Boilingd) Adding salt
3. Why is filtration alone not enough to make water safe to drink?
   a) It makes water taste badb) It removes only particles, not virusesc) It adds chemicals to waterd) It is too slow

Write T for True or F for False in the brackets.

1. Kills bacteria and viruses is one of the key concepts in the lesson on Getting Clean Water.
2. Removes large debris is the main topic of this lesson.
3. Boiling is the most reliable method — one minute of boiling kills all bacteria and viruses.
4. Filtering through cloth is the most reliable method — one minute of boiling kills all bacteria and viruses.

1. In your own words, explain what Getting Clean Water means.
2. List two things you learned from this lesson on Getting Clean Water.