MYPSCIENCE
Name: Rajat
LAB REPORT Group: 3
Lab Report
Research Question : How is y dependent on x?
Will using different pH liquids affect the growth of the mung beans?
Variables
Manipulation
x - Independent (what will I change?)
Change the pH, 3, 5 & 7
pH
y - Dependent (what will I measure?)
How many Mung Beans germinate
Plant Germination rate
Controlled (what will I keep the same?)
Amount of sunlight,
Amount of pH (20ml)
Amount of Seeds
20ml for each pH,
Keep the dish in the same place,
(temperature)
3 seeds in each petri dish
Hypothesis
If I increase pH 7 into the mung beans then there will be an increase in the height of
the mung beans because according to http://theagricos.com, water causes the seed
to swell and soften which makes the plant breakthrough.
PLANNING
Procedure : What will I do?
- Prepare 3 petri dishes
- After preparing the dishes, then spread cotton all over each of the petri dishes.
- Put 3 mung beans into each petri dish
- Measure the ph liquids with the tube (20ml)
- add 20ml of each pH in each petri dish (label each petri dish as “ph 2, ph 5 etc...)
- Keep the petri dishes in same place with the same amount of sunlight
- Leave it for 48 hours to see if there is any reaction
- Observe the plants each day
- Record Data
Materials : What do I need?
- 3 petri dishes
- 3 Plastic lids
- 9 mung bean seeds
- Cotton
- Tube
- Beaker
- 30cm Ruler
- 20ml of each pH
(pH 3 (changed to 2), 5 & 7)
DATA COLLECTION AND PROCESSING
MYPSCIENCE
Raw Data Table
How will you record your quantitative data?
pH
Germinated seeds
2
3 out of 3
5
3 out of 3
7
2 out of 3
Observations
What qualitative data will you record?
After doing the experiment which was pH and the mung beans, my observations were that all
of the pH with the seeds in it germinated except one seed in pH 7. The tallest height for the
mung beans in this experiment was 1.5cm which was in the pH 2 petri dish. After seeing
most of the seeds the biggest seed was in pH 2. For pH 2 and 5 all the seeds germinated
100% except pH 7 where 2 out of 3 seeds germinated. The color of the cotton has changed
to green and yellow color which was from the mung beans.
Data Processing
Use words and/or math to describe how you will change/manipulate your raw data
100* Amount of seed germination
Total of seeds in petri dish
i.e: 100*2 = 200 = 66.7%
3
3
Processed Data Table
A new table with your processed data
pH solutions
Percentage of
germination (%)
2
100.00%
5
100.00%
7
66.7%
Graph
Attach your graph to the back of the lab write-up sheet
Mung Bean Germination on pH
in percentage
Percentage of Germination (%)
100.00%
80.00%
Percent of Germination (%)
DATA COLLECTION AND PROCESSING
MYPSCIENCE
60.00%
40.00%
20.00%
0%
pH 2
pH 5
pH Levels
pH 7
MYPSCIENCE
Conclusion
EVALUATION AND CONCLUSION
Tell how your question was answered
My hypothesis was “If I increase pH 7 into the mung beans then there will be an increase
in the height of the mung beans because according to http://theagricos.com, water
causes the seed to swell and soften which makes the plant breakthrough.” The data did
not support my hypothesis. As you can see above in my graph, when starting from a low
pH and increasing to a high pH, the number of germination will decrease. According to
my experiment, pH 2 has the best growth because it germinated up to 1.5cm, but pH 5
didn’t germinate as long as pH 2 did. Overall the mung beans for both pH 2 and 5 had a
total of 3 seeds that germinated, which means 100% germination. My hypothesis was
contradicted by the data because for the seeds in the pH 7 petri dish, the total amount of
seeds that germinated was 66.7% which means 2 out of 3 seeds germinated. So after
doing my experiment, I now know that lower pH levels can help mung beans germinate!
The best mung beans that germinated were pH 2. During planning and setting up my
experiment, I had to change the different pH levels, I changed pH 3 and did pH 2 instead,
since it was already there for me to use. This didn’t affect my experiment at all since I
was just changing the pH liquid.
Evaluation
Explain anything that happened you did not expect
Error
Some seeds were
closed to each other
and didn’t have enough
space to grow
Some of the seeds that
I chosen were old and
already harvested and
couldn’t be able to
germinate
Over pouring the
amount of the pH
solution into the petri
dishes with the mung
beans
Significance
Improvement
Moderate
Spreading the seeds out so that they
are easier to grow and not
interrupting other seeds in the
germination process
(low, moderate, high)
Moderate
High
Choose and get fresh seeds and not
old and black color ones to use for
the experiment.
Measure accurately 20ml of each pH
liquid or then it might affect the
growth of the seeds in each petri
dish.
Next Testable Question
What experiment could you do next?
If I planted the same mung beans using soil, will I get the same
result as I did with cotton?