To determine the effect of drinking different volumes of water on the volume of urine released.

1.Problem Statement:

What is the effect of drinking different volumes water on the volume of urine released?

2.Aim:

To determine the effect of drinking different volume of water on the volume of urine released.

3.Variables:

Manipulated variable : volume of water intake

Responding variable : volume of urine released

Fixed variable : same student/same environment/ time

4.Hypothesis:

The higher the volume of water intake, the higher the volume of urine released.

5.Materials : Boy/girl/student, water

Apparatus : Beakers, glass/cup/mug, measuring cylinder, stop watch

6.Technique:

Measure and record the volume of urine released (after a fixed hour of consuming water) by using a measuring cylinder.

7.Procedure:

1.	A student (Sample A) is chosen and instructed to empty his bladder before the start of the experiment
2.	Measure 200ml of water and put it into the mug/cup/glass.
3	A student (Sample A) is given 200ml of water to drink.
4	A stop watch is started immediately after consuming the water.
5	During the experiment, he is kept in (any fixed suitable room) within 2 hours (any suitable time range).
6	He is instructed not to eat or perform any vigorous physical activities (within the given time).
7	After 2 hour, the stop watch is stopped and he is asked to empty his bladder.
8	The volume of urine collected is measured and recorded.
9	Steps 2 – 8 is repeated for different amount of water drank (400 ml, 600ml, 800ml).
12	The whole experiment is repeated using 2 different students to get a more accurate result.
13	Dispose the measured urine properly
14	Measure and record data collected into a table. Graph of urine output against the water intake is plotted.
15	Precaution : Student is instructed not to eat or perform any vigorous physical activities during the experiment.

8. Results/ data:

Volume of water intake (ml)	Volume of urine released (ml)
	Student A	Student B	Student C	Average
200
400
600
800

9.Conclusion:
The higher the volume of water intake, the higher the volume of urine released. Hypothesis is accepted.