SECTION 5 QUESTION 2
21. The diagram below shows the apparatus used to investigate the rate of photosynthesis in a
submerged plant. The light intensity to which the plant is subjected, was decreased at regular
Intervals by moving the light source away from the plant. The average number of bubbles released
pet minute, was counted and recorded for each distance.
study the information provided and answer the questions that follow.
The results obtained is shown in the following table.
Distance from lamp (cm)
5
10
20
25
35
40
50
Number of bubbles per minute.
70
65
40
25
15
5
2
2.1.1. Formulate a hypothesis for the above investigation.
2.12. Slate the following
(1) Dependent variable
(2) independent variable
(3) Fixed variable
2.1.3. State ONE way in which the reliability of the investigation could be improved.
2.1.4. Draw a line graph to represent the data in the table
(13)​