Another 3 ideas

My first 3 ideas were rejected because of their feasibility and difficulty level. I have typed out the reasons why they were rejected in red in the previous blog post. Because of this, I have thought up another 4 possible research questions to consult with Ms Tan.

#1

Research question: How do different carbonated drinks (Coca-Cola, 7-up, Sprite, etc.) affect the rate of corrosion of a stimulated tooth(chicken bone)?

Hypothesis: Coca-Cola results in the greatest rate of corrosion of a stimulated tooth.

Independent variable: Type of carbonated drink

-Coca-Cola

- Pepsi

- 7-Up

- Sprite

- F&N

Dependent variable: Rate of corrosion of a stimulated tooth

Controlled variables: Type of container they are kept in, amount of carbonated drink the "tooth" is submerged in, type of stimulated tooth (chicken bone)

#2

Research question: How does the pH level affect the growth rate of common Singapore household mould (aspergillus, penicillium, etc.)?

Hypothesis: The more acidic the pH level, the higher the rate of mould growth.

Dependent variable: Growth rate of mould

Independent variable: pH level

Controlled variables: Amount of water placed in the containers with the mould, type of container, amount of light exposed to the mould

Method to measure mould:

1. Trace out the outline of the mould on tracing paper

Place it on a graph paper

Count the number of 0.1x0.1 square cm grids in which the mould covers more than 90%

#3

Research question: Which of the most common substances used (Bleach, vinegar, detergent, baking soda, grapefruit seed extract) in getting rid of mould is the most effective?

Hypothesis: Grapefruit seed extract is the most effective in getting rid of mould.

Independent variable: Substances used

Dependent variable: Amount of mould left

Rough outline of the method I'll be using for this experiment:

1. Scrape and place mould the size of a 50 cent coin on a plastic sheet

2. Pour a cup of bleach into a spray bottle

3. Pour 10 cups of water into the same spray bottle

4. Shake thoroughly

5. Spray it 3 times on the mould

6. Wait for 5 minutes

7. Wipe the mould 10 times back and forth with a cloth

8. Outline the remaining mould with tracing paper

9. Place it on graph paper

10. Count the number of 0.1x0.1 square cm grids in which the mould covers more than 90%

#4

Research question: Does the angle of the surface on which live mushroom (fungi) grows on affect its direction of growth?

Hypothesis: The angle of the surface on which fungi grows affects its direction of growth.

Independent variable: Angle of surface (cardboard)

- 90 degrees

- 180 degrees (flat)

- 45 degrees

Dependent variable: Direction of mushroom (fungi) growth

Science: Biology and Physics

- Concerns the growth of organisms (fungi)

- Testing if gravity is a factor in the direction of fungal growth as the

Brief Research:

- Fungi grow in a wide range of habitats, including extreme environments such as deserts or areas with high salt concentrations

Benefit of research:

- This is to increase farmers' awareness of ground elevation when growing mushrooms to ensure that they will reach optimal growth and will not break along the way

- Clear worries of farmers if they were to grow their mushrooms or other fungi in confined areas at angles.