Independent Variable: This is the cause. Dependent Variable: This is the respons
ID: 221773 • Letter: I
Question
Independent Variable: This is the cause.
Dependent Variable: This is the response or effect.
One hundred samples of several different plants were placed in each of six sealed containers with water in them. At the end of two days the amount of oxygen produced was measured. Results are shown in the table below.
Container
Plant
Height of Plant
Light Intensity
Source of Light
Distance from Light
mL O2 Produced
1
Iris
4"
High
Artificial
6"
16
2
Iris
4"
High
Natural
6"
13
3
Iris
6"
Low
Artificial
5"
12
4
Carnation
6"
High
Natural
4"
13
5
Carnation
6"
Low
Natural
4"
9
6
Carnation
4"
Low
Artificial
5"
14
Multiple Choice: Based on the data presented in the table, which two containers could be correctly used to compare the rate of photosynthesis at two different light intensities? (5 points)
a. 1 and 2
b. 2 and 3
c. 1 and 5
d. 5 and 6
e. 4 and 5
Container
Plant
Height of Plant
Light Intensity
Source of Light
Distance from Light
mL O2 Produced
1
Iris
4"
High
Artificial
6"
16
2
Iris
4"
High
Natural
6"
13
3
Iris
6"
Low
Artificial
5"
12
4
Carnation
6"
High
Natural
4"
13
5
Carnation
6"
Low
Natural
4"
9
6
Carnation
4"
Low
Artificial
5"
14
Explanation / Answer
The correct answer is: e. 4 and 5
Reason: This is because in 4 and 5 ,plant type, plant height,source of light and distance from light is the same.The only difference is in the intensity of light and this difference can be used to compare the rate of photosynthesis at two different light intensities.