Aim : To study the effect of the different quantities of water intake on urine output.

Problem Statement : What is the effect of different quantities of water on urine output?

Hypothesis : The more the water intake, the more the volume of urine produced.

Variables:Manipulated : Volume of water intake.Responding : Volume of urine produced.Constant : Time, no food before experiment.

Materials : Paper cups and mineral water.

Apparatus : Measuring cylinder.

Procedure:

1. Four students A,B,C and D were asked to empty their bladders.2. Student A ,Student B ,Student C and Student D were given 200 ml,300 ml ,400 ml

and 500 ml of water to drink respectively.3. After 40 minutes ,the four students were asked to empty their bladders and the

urine collected in paper cups were measured and recorded.4. The volume of urine produced by each student was measured and recorded.5. Another four students A,B,C and D were asked to repeat steps 1 to 4.

Results:

Student Volume of Volume of urine Produced (ml)water taken(ml) 1st student 2nd student 3rd student

A/A1 200 180 150 165B/B1 300 230 250 240C/C1 400 356 338 347D/D1 500 472 454 463

Discussion:

1. When the volume of water is increased, the volume of urine produced is increased.

Conclusion:

The student who drank more water produces more urine. The hypothesis is accepted.