This is the practice lab report that I did.
Gummy Bear Lab Report
By: Joshua
Purpose
The purpose of the gummy bear lab was to determine the diffusion of gummy bears in salt water.
Hypothesis
If I put gummy bears in salt water, then it will increase in size.
Materials
- Cup
- 1 Gummy Bears
- 3 teaspoons of salt
- 100 mL of water
Procedure
- Find a cup, 1 gummy bear, 3 teaspoons of salt, and 100 mL of water.
- Pour the water into the cup and add the gummy bear
- Wait for 48 hours.
- Remove the gummy bear.
- Measure the gummy bear.
Data Collection
| Dimensions |
Initial Size |
Final Size |
| Length |
1 centimeter |
1.1 centimeter |
| Height |
1.6 centimeter |
2 centimeter |
| Width |
1 centimeter |
1.1 centimeter |
It was squishier than before, the color became a little plainer, less bubbles. He easily fell apart with a light tap
Data Analysis
Vi=1.6 cm3
Vf=2.42
%change=151%
Growth of Gummy Bear in Salt Water

Explanation
Since my gummy bear increased in size that means that water diffused into the gummy bear, making it larger. The gummy bear in salt water didn’t increase as much because the concentration of water between the gummy bear and salt solution were about the same.
Alternative Explanation: The salt may have absorbed some of the water, making less water to diffuse than before. As part of my further investigation I would like to test gummy bears in water with a lower concentration of salt.
Errors
Some possible sources of error is that I could’ve measured the gummy bear incorrectly, didn’t put enough salt, and didn’t dissolve the salt enough. Water could have been hot.
Conclusion
In this lab, I learned about diffusion in a gummy bear. My hypothesis was correct. I put the gummy bear in water and observed it after. It was squishy and had a darker color. I learned that diffusion isn’t as effective if the concentrations of two objects are similar. This lab was based on observing what happens during diffusion with gummy bears in a solution with a similar concentration of water.
Reflection
I think that I learned a lot from my practice lab report and that if we didn’t do it my grade would probably be hanging around a sixty now. There were a lot of topics that I didn’t manage to cover and I was missing many key items. My previous knowledge wouldn’t have helped me because that’s what I relied on.
This is the final product.
Gummy Bear In Cold Water
By: Joshua
Purpose
The purpose of this experiment was to compare the diffusion of two gummy bears in water of different temperatures.
What We Know
- Water molecules move slower in the cold
- Water molecules move faster in heat
What We Don’t Know
- What will happen to the gummy bear in cold water
Hypothesis
If gummy bears are placed in cold water then it will increase in size but not as much as the gummy bear in room temperature water because the water molecules move slower.
Manipulated Variable
Responding Variable
Materials
- 200 mL cup
- 100 mL Graduated cylinder
- 2 pink gummy bears
- Refrigerator
- 100 mL of distilled water
Procedure
- Measure out 100 mL of distilled water with a graduated cylinder
- Pour the water into a 200 mL cup
- Measure the height, length, and width of the pink gummy bear
- Place the gummy bear into the cup with the water in it
- Place the cup with the gummy bear into a refrigerator
- Wait for 24 hours
- Remove the gummy bear
- Measure the gummy bears height, length, and width
Data Collection
| Dimensions |
Bear in Cold Water |
Bear in Warm Water |
| Length before |
1.6 cm |
1.6 cm |
| Width before |
1 cm |
1 cm |
| Height before |
1 cm |
1 cm |
| Volume before |
0.53 cm3 |
0.53 cm3 |
| Length after |
2.5 cm |
3 cm |
| Width after |
1.5 cm |
1.6 cm |
| Height after |
1 cm |
1.7 cm |
| Volume after |
1.25 cm3 |
2.72 cm3 |
| % change |
135% |
413% |
Observations
I observed that it was squishier than before we put it in the water, the color became a little plainer, less bubbles were inside the gummy bear, and the gummy bear was harder than the gummy bear in water at room temperature.
Data Analysis
Equation for Volume: l x w x h = v
Percent of Growth of a Gummy Bear in Different Temperature Waters

Explanation
Since my gummy bear increased in size that means that water diffused into the gummy bear, making it larger. The cold gummy bear didn’t grow as much as the warm gummy bear because the molecules entered the cold gummy bear slower than the gummy bear in warm water. These results mean that my hypothesis was correct.
Alternative explanation: The refrigerator could have made the gummy bear so cold that it could have gotten denser making it harder for the water molecules come in.
Errors
Some possible sources of error that could have been made is that someone could have measured the temperature of the water before it was completely chilled, causing us to have incorrect measurements. It is impossible to measure the gummy bear perfectly when the time reaches the limit because humans can’t measure the smallest fraction of a measurement and even when you think you can’t get closer there will always be a number smaller.
As part of my further investigation I would like to see what happens if you put a pink gummy bear into a cup of hot water in comparison with a cup of cold water.
Conclusion
In this lab I learned about diffusion of a gummy bear in different temperatures of water. My hypothesis was correct. I placed the gummy bear in cold water and observed it after 24 hours. It was stiffer and smaller than the gummy bear in warm water, meaning it was denser. I learned that diffusion in cold fluids aren’t as affective as diffusion in warm fluids. This lab was based on observing diffusion when a gummy bear is placed in cold water.
Reflection
This lab report was really important to me because it helped me gain better knowledge for future lab reports and even though I didn’t get the best grade in the world my mistakes will help me in future lab reports.
