2. The treatment of water begins with __________ .
a) Filtration
b) Screening and Aeration
c) Disinfection
d) Sedimentation

3. The human body is made up of ______ percent of water.
a) 71
b) 32
c) 10
d) 29

4. The National Water Commission was formally established in .
a) 1928
b) 1980
c) 1960
d) 1979

5. The NWC produces more than ______ of Jamaica's total potable water supply.
a) 70%
b) 90%
c) 58.5%
d) 35%

6. ________ of a living tree is water.
a) 75%
b) 40%
c) 55%
d) 90%

7. A dairy cow must drink _______ of water to produce one gallon of milk.
a) 4-5 gallons
b) 1-2 gallons
c) 3-4 gallons
d) 1 gallon

8. A leaking faucet can waste up to _____ gallons of water per day.
a) 100
b) 500
c) 50
d) 125

9. One gallon of water weighs approximately ____ pound.
a) 2
b) 12
c) 15
d) 9

10. The average amount of water a person uses to brush his/her teeth is ______ gallon/s.
a) 3
b) 2
c) 1
d) 2.5