Change of mass and SA of meat in coke over 48 hours experiment 3 final version

1.     What do you want to find out? (Aim/Purpose/Research question)

How does the mass of meat placed in coke change over 48 hours?

2.    What is the tentative explanation of your research question? (Hypothesis)

The masses of the pieces of meat will be different if soaked for difference amounts of time in coke.

3.    In an investigation, there is only one variable to be changed. Which variable will you change in this investigation? (Independent Variable)

Amount of time the meat is place in coke for before being weighed.

4.    All the other variables must be kept constant. What are a few important variables that will affect the results greatly? (Controlled Variables)

·      amount of solution in each container

·       approximate size of each piece of meat

·      temperature of surrounding

·       temperature of liquid

·      relative shape of container(as long as the pieces of meat are able to be completely covered with Coca Cola with 200ml of Coca Cola, the shape does not matter)

·      type of meat used

·      place where bottles are placed

·      whether meat is cooked or raw

.      pH of solution that pieces of meat are placed in

5.    What results will you measure? (Dependent Variable)

Mass of pieces of meat after the meat has been left in coke for 12,24,36 and 48 hours, as well as observations made, of the solutions and pieces of meat.

6.    What are the materials and apparatus that you will need to carry out the investigation? (Materials and Apparatus)

- 4 empty drink bottles

- 400ml of Coca Cola

- 400ml of vinegar

- chicken breast

- steamer

- knife

- ruler

- weighing scale

- paper towels

- pH probe
- a large beaker
- calculator

7.    What are the steps that you will take to carry out the investigation? (Procedure)

Step 1: Use the knife to cut out 1 piece of raw chicken breast meat of approximately 1cmx2cmx2cm.

Step 2: Pour 200 ml of Coca Cola into 1 bottle

Step 3: Measure the pH of the Coca Cola using a pH probe

Step 4: Record the pH level of the Coca Cola down

Step 5: Measure the pH of the vinegar with a pH probe and dilute it with water in the beaker if its pH is lower than that of coke until its pH level is equal to that of the Coca Cola in the bottle.

Step 6: Pour 200 ml of the vinegar into a bottle

Step 7: steam 1 pieces of chicken meat(minced and then shaped as it is easier to achieve the desired size this way) of at least approximately 4cmx4cmx2cm or larger just until it is cooked through

Step 8: Cut out 1 piece of chicken meat measuring approximately 1cmx2cmx2cm from the cooked piece of meat

Step 10: Pat all pieces of meat dry lightly using a paper towel to remove any excess liquid then, using a weighing scale weigh each piece of meat and record their masses down

Step 11: Place one piece of raw chicken meat into a bottle of Coca Cola and the other piece of raw chicken meat into a bottle of vinegar

Step 12: Place one piece of steamed and cut chicken meat into a bottle of Coca Cola and the other piece of steamed chicken meat into a bottle of vinegar

Step 13: Close the bottles using the bottle-caps

Step 14: Leave bottles in a shaded area of room temperature 

Step 15: After 12 hours observe the pieces of meat and the solutions they are in and record down observations

Step 16: remove pieces of meat from the bottles and weigh them after patting pieces of meat dry lightly using a paper towel to remove any excess liquid 

Step 17: record data collected 

Step 18: place pieces of meat back in their original solutions and bottles

Step 19: repeat steps 15-18 at intervals of 12 hours at 24, 36 and 48 hours since the beginning of the experiment

Step 20: organize data into a table calculating any change in weight and calculating change in weight in percentage using a calculator

8.    How are data collected? (Data collection)

Data is collected using a weighing scale. The weighing scale enables me to know the mass of the pieces of meat. The pieces of meat are weighed before, at intervals during and after the experiment, after which the data collected organized into a table, and weight change in percentage after each 12 hour period is calculated using a calculator, as well as total weight change . After this, weight change percentage is compared which allows me to know which solution and what type of meat is most affected in terms of weight over 48 hours, and if there is and what the pattern of weight change in the pieces of meat are.