Annex A - Group Research Proposal

Group Project Proposal (Science)
Names: Afiq Prasanto, Min Khant Htien, Zavier Teo
Class: S2-04
Group Reference: F    

1.    Indicate the type of research that you are adopting:

[ X ] Test a hypothesis: Hypothesis-driven research
e.g. Investigation of the antibacterial effect of chrysanthemum

[ ] Measure a value: Experimental research (I)
e.g. Determination of the mass of Jupiter using planetary photography

[ ] Measure a function or relationship: Experimental research (II)
Title: An investigation of the effect of the color of light on the growth of Cabomba.

[ ] Construct a model: Theoretical sciences and applied mathematics
e.g. Modeling of the cooling curve of naphthalene

[ ] Observational and exploratory research
e.g. Investigation of the soil quality in School of Science and Technology, Singapore  

[ ] Improve a product or process: Industrial and applied research
e.g. Development of a SMART and GREEN energy system for households  

Title: An investigation of the effect of the color of light on the growth of Cabomba.

Question being addressed

    A student wanted to find out if the color of light affects the growth rate of Cabomba.
    The independent variable is color of light.
    The dependent variable is the volume of water displaced.
    The constants are:
(a)  The intensity of light given to all the Cabomba.
(b)  Type of water used to fill the beaker.
(c)  The location of the experiment.
(d)  Type of lights used
(e)  Starting length of Cabomba
(f)   Amount of time that the light is turned on
(g)  Water quality

The Cabomba will grow best in red and blue light.

Equipment list:

  • 6 Clean Beakers (250 ml)
  • 5 different Colored Lights (Blue, Green, Yellow, Red, White)
  • 6 Test Tubes
  • 6 Funnels
  • 500g of Cabomba
  • 6 Opaque Boxes
  • 1 Ruler
  • 10L of 1% Bi-carbonate water
  • Electric Supply
  • Data logger with light sensor
  • 2 Plastic Beakers


Set up the experiment as shown in the diagram above. (5 setups & 1 setup without LED)

  1. Measure each Cabomba making sure that all of them are of equal length, 8cm and mass, 1.7g (2 s.f).
  2. Place the Cabombas in the funnels.
  3. Place the funnels upside down in the breakers.
  4. Fill the beakers with water (1% bicarbonate) till the tip of the funnel is fully submerged.
  5. Fully fill the test tubes with water (1 % bicarbonate).
  6. Cover the mouth of the test tubes and gently place the test tubes in the beaker, onto the tip of the funnel, making sure that there are no water displacement in the test tubes.
  7. Place the 7 setups each with cabomba inside the opaque boxes with led strips attached in them.
  8. Seal the box so that no light from the outside can enter.
  9. Measure the water displacement in the test tubes after 3 days.
Risk and Safety

As this experiment involves glass beakers, avoid breaking it to reduce the risk of being cut. As we are using led lights, we must be careful not to look at the lights for a long period of time as it can cause damage to our eyes. Make sure hands are dry when in contact with the electric lamps. Keep water and plant containers away from electric plugs.

Data Analysis
    Tabulate the data and calculate the average growth of the Cabomba then plot a graph of the average height of the Cabomba against the light in which it was grown in. From the graph, we can find out which colour of light is the best for making cabomba grow the most. (The aim)
    Tips for using Cabomba
            Cabomba does best when grown in neutral water under moderate lighting. Water temperature between 72°-82°F, an alkalinity of 3-8 dKH and a pH of 6.5-7.5 is ideal for proper growth.

Cabomba is a pondweed with specialised tissue called aerenchyma that allows gases to diffuse inside the plant. If you cut through the aerenchyma these gases can escape and bubble out of the plant.

Bibliography, (2015). How to care for Cabomba, Cabomba caroliniana, with pictures. [online] Available at:,%20Cabomba.htm [Accessed 16 Jan. 2015].

Cabomba (Cabomba caroliniana). (n.d.). Retrieved from 1632 796&pcatid=796

Demonstrating oxygen evolution during photosynthesis using Cabomba pondweed. (2015, January 1). Retrieved from

Ensbey, R., & Van Oosterhout, E. (2010, March 24). Cabomba. Retrieved from

Science Fair Projects - Effect of oil spills on aquatic plants. (n.d.). Retrieved January 15, 2015, from

Heating Lamp [Web Photo]. Retrieved from

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