Link to proposal: http://goo.gl/b2IW75
SCHOOL OF SCIENCE AND TECHNOLOGY, SINGAPORE
INVESTIGATIVE SKILLS IN SCIENCE
Thomas Joseph Lee Alba
Chiang Kai Jie
Grace Tan Hui En
Group Reference: B
1. Indicate the type of research that you are adopting:
[ ] Test a hypothesis: Hypothesis-driven research
[ ] Measure a value: Experimental research (I)
[ X ] Measure a function or relationship: Experimental research (II)
[ ] Construct a model: Theoretical sciences and applied mathematics
[ ] Observational and exploratory research
[ ] Improve a product or process: Industrial and applied research
2. Write a research proposal of your interested topic in the following format:
An investigation of the effect of different coloured lights on the growth of different coloured plants.
A. Question being addressed
A student wanted to find out if different coloured light affects the growth of 3 types of plants which have 3 different coloured leaves.
Colour of light
Height of Plant Growth
- Amount of light must be the same for every plant
- Amount of water given to each type of plant must be the same
- Amount of air in the surroundings must be the same
- Same type of soil should be used to ensure that the amount of nutrients is the same
Lightwaves at higher intensity result in a higher rate of photosynthesis, therefore plants that grown under blue, followed by red will have the greatest impact on plant growth. Green light is least effective because of the reflection of green light due to the plant’s chlorophyll. Only the chlorophyll will affect photosynthesis (therefore affecting the growth rate too) and not the colour of the leaf.
C. Description in detail of method or procedures
Quantity / Remarks
LED Light Strips
Red, Blue, Yellow, Green
Plants of different coloured leaves
3 young plants of each colour
Green leaves : Mung Green Bean Plant
Red Leaves : Fittonia
Purple leaves : Syngonium
45, 15 each type
PINGLA 56x37x36 cm boxes
To place plants in (each box will be for each colour of light )
4 (4 colours of light)
For the plant
To allow the plant to grow and absorb minerals
To contain the plants
BOMEX Beaker (250ml)
To contain 250ml of water needed for watering the plants
To ensure even amount of water provided for each pot of plant
To ensure that there are no holes in box itself and to seal any open holes for any source of light to enter the box.
Total money needed : $130.95
Types of plants we are using
1) Mung Green Beans
Fig. 1: Mung Green Beans, Source: My Green Thumb, 23rd DECEMBER 2010
Light requirements : Any light intensity is fine
Water requirements : Should be watered to provide preliminary moisture for the plants
Soil requirements : Place in a light, well-drained compost. Susceptible to rot, so water only
when completely dry.
Fig. 2: Fittonia, Source: Frog Forum, 19th July 2014
Light requirements : Indirect Sunlight
Water requirements : Plants should be kept constantly moist, with high ambient humidity.
Mist frequently or grow in a tray with pebbles and water.
Soil requirements: Fittonia can be easily grown in conventional, peat-based potting soil. Make sure it can retain moisture, but will not remain soggy
Fig. 3: Purple Syngonium, Source: Flowermania forum by Silvia Ivanova, 14th September 2007
Light requirements : Bright light but no direct sun.
Water requirements : Spray frequently to maintain high humidity.
Keep soil continuously moist throughout spring and summer, and reduce
watering in the winter, but don't let it dry out.
Soil requirements : Rich, well-drained potting mix.
Under each coloured light, there are 3 plants for each type of plant for more accurate results.
There are also controls under sunlight.
Procedures: Detail all procedures and experimental data collection
1. Measure the height of the plants and the number of leaves of each plant. We will also take a picture of each plant. (the pictures will be used for comparison at the end of the experiment and for the video)
2. Destarch the red and purple young plants by putting in a dark cupboard for 48 hours. (Green beans did not need to be destarched because they were still in the germination stage and do not have leaves yet, so they are unable to photosynthesize)
3. While the plants are being destarched, we will make the setup as shown in fig.5. We will set up the cardboard boxes and attach the LED strips in a straight formation to the top of the cover. We will also cover the interior of the boxes completely with black paper to ensure that the light is absorbed and not being reflected by the brown coloured interior of the box onto the plants as the plants will receive different amounts of light, causing the experiment to be unfair.
4. After placing them in the setup, we will take out the plant to record the height and take a picture of each plant every Monday, Wednesday, and Friday (the pictures will be used for comparison at the end of the experiment).
We will water the plants with sufficient amount of water too. (5ml each plant)
5. After experiment is over, we make a tables and histograms to record data
Risk and Safety: Identify any potential risks and safety precautions to be taken.
Water and electricity
Wear rubber gloves at all times and make sure that no water is present near /in contact with the power sockets as it might cause electrocution.
Bacteria in soil
Wear gloves whenever we are handling soil and always wash hands after we are done handling the setup.
The cardboard catches fire from the light strip
Have a fire extinguisher in the room that is still working and make sure it is reachable.
Data Analysis: Describe the procedures you will use to analyze the data/results that answer research questions or hypotheses
- We are to record the growth of the 3 types of plants (with different types of leaves) growing under different types of light. We will use recordings and pictures collected every 2 days as data collection for our discussion.
- We will record the average height of each plants on tables. There will be three tables, one for each batch of plants, and we would divide the tables with the type of plant and which colour of light the plants were placed in
- We compare the tables for each plant together with the colour of light for easier reference and as the final data.
D. Bibliography: List at least five (5) major references (e.g. science journal articles, books, internet sites) from your literature review. If you plan to use vertebrate animals, one of these references must be an animal care reference. Choose the APA format and use it consistently to reference the literature used in the research plan. List your entries in alphabetical order.
Colorado State University (2011, December 1). CMG Garden Notes. . Retrieved July 16, 2014, from http://www.ext.colostate.edu/mg/gardennotes/142.html
Buddies, S. (2013, January 10). Plants on the Move! Experiments with Phototropism. . Retrieved July 16, 2014, from http://www.sciencebuddies.org/science-fair-projects/project_ideas/PlantBio_p041.shtml
Wassink, E. C., & Stolwijk, J. A. (1956). Effects of Light Quality on Plant Growth. Annual Review of Plant Physiology . Netherlands: Agricultural University Wageningen.