Section A Per 6
Question 1
1. The table below shows the results of an investigation in which the effect of
temperature and light on the yield of tomatoes in two greenhouses on a farm was
investigated.
TEMPERATURE
AVERAGE YIELD OF TOMATOES PER PLANT
(°C)
(kg)
LOW LIGHT LEVELS HIGH LIGHT LEVELS
5
0,5
0,5
10
1,5
2,5
15
3,0
5,0
20
3,6
8,5
25
3,5
7,8
30
2,5
6,2
Per
1.1 State TWO steps the investigator may have taken into consideration during
the planning stage of the investigation.
(2)
1.2 Identify the:
(a) Independent variables
(b) Dependent variable
(2)
(1)
1.3 Plot bar graphs on the same system of axes showing the results of the
average yield of the tomatoes from 20°C to 30°C for both light levels.
(6)
1.4 State ONE way in which the scientists could have improved the reliability
of the investigation.​