Experiment II: Effects of Salt on Plant growth Three treatments were used Plant
ID: 62724 • Letter: E
Question
Experiment II: Effects of Salt on Plant growth
Three treatments were used
Plant growth in cm (Height at 6 days – initial height)
Plant #
Treatment 1
Treatment 2
Treatment 3
1
9.2
5.3
5.9
2
8.3
4.7
4.6
3
8.9
6.2
5.9
4
7.3
4.2
5.2
5
9.6
5.6
6.7
6
7.8
7.4
4.5
7
9.5
6.6
4.3
8
10.2
2.6
3.4
9
10.4
7.9
6.7
10
10.7
4.3
6.5
11
6.7
6.9
2.4
12
9.7
7.4
7.2
Treatment 1: 12 Mung Bean plants were water every other day with 20mls of tap water
Treatment 2: 12 Mung Bean plants were water every other day with 20mls of .05M salt solution
Treatment 3: 12 Mung Bean plants were water every other day with 20mls of .1M salt solution
All plants were kept under the same light conditions and the same temperature.
Measurements of each plant’s height were made at the start of the experiment and measurement of the final height for each plant were taken at the end of the experiment (2weeks). Growth was calculated by subtracting the initial height of each plant from the final height of each plant.
Instructions
Using the data provided in the table above:
1) Identify the independent and dependent variables
2) Identify the control group
3) Graph the data using a bar plot. The graph should include the following:
I. An appropriate graph title that reflects the nature of the experiment
II. Clearly and appropriately labeled Y axis
III. Clearly labeled X axis that identifies each treatment. DO NOT LABEL THEM AS TREATMENT 1, TREATMENT 2, and TREATMENT 3. You should have a control and two levels of salt.
4. Based on your graph, provide a brief description of the results of the experiment.
In the second experiment there was a question as to whether the initial height of the plants had an impact on the overall growth rate of the plants under the different treatments. To look at this you will need to create a graph that relates initial heights to growth.
Plant #
Treatment 1
Treatment 2
Treatment 3
Initial Height(cm)
Plant growth(cm)
Initial Height(cm)
Plant growth(cm)
Initial Height(cm)
Plant growth(cm)
1
7.1
9.2
6.8
5.3
7.2
5.9
2
6.4
8.3
8.1
4.7
8.2
4.6
3
7.2
8.9
7.0
6.2
6.6
5.9
4
8.2
7.3
6.2
4.2
6.9
5.2
5
6.6
9.6
7.2
5.6
6.8
6.7
6
6.9
7.8
6.8
7.4
8.1
4.5
7
7.1
9.5
8.1
6.6
6.7
4.3
8
7.3
10.2
6.7
2.6
7.3
3.4
9
6.8
10.4
7.3
7.9
6.8
6.7
10
7.3
10.7
6.7
4.3
8.1
6.5
11
8.0
6.7
7.2
6.9
7.2
2.4
12
7.9
9.7
6.7
7.4
8.2
7.2
Instructions
1) Graph the data so that a comparison of initial height to final height can be made (this should be one graph, not three separate graphs)
2) Include an appropriate title that indicates what is being compared
3) Clearly and accurately label both the X and Y axes
4) Provide a legend, which indicates the actual treatments
5) Provide a brief explanation that indicates whether initial plant height impacted response to the treatments.
Plant growth in cm (Height at 6 days – initial height)
Plant #
Treatment 1
Treatment 2
Treatment 3
1
9.2
5.3
5.9
2
8.3
4.7
4.6
3
8.9
6.2
5.9
4
7.3
4.2
5.2
5
9.6
5.6
6.7
6
7.8
7.4
4.5
7
9.5
6.6
4.3
8
10.2
2.6
3.4
9
10.4
7.9
6.7
10
10.7
4.3
6.5
11
6.7
6.9
2.4
12
9.7
7.4
7.2
Explanation / Answer
1. Salt concentration is the independent variable in this experiment.
Plant height is the dependent variable in this experiment.
2. Number of mung beans used, light, and temperature are the control group.
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