Diffusion Lab
Materials: old, stale, gummy bear, water container, ruler, and balance.

Copy the data table on one page in your science notebook. On a second page write your hypothesis, analysis, and conclusion.

Day 1
Day 2

Bear Color

1. In pencil, write your bear’s name on a paper scrap and put it in the jar.

2. Read the question and write a hypothesis.

3. Measure the length, width, height, and mass of your bear. Put it in water.

4. Calculate your bear’s volume. Length x width x height = volume

5. Calculate your bear’s density. Mass ÷volume = density

6. The next day, repeat steps 3, 4, & 5.

7. Answer the analysis questions.
8. Write a conclusion.
Question: What do you think will happen to a stale bear when you put it in water over night?

Hypothesis: (Predict what you think will happen to the length, width, height and mass of the bear after soaking.)

1. Was your hypothesis correct? Why or why not?
2. Which change is greater – volume or mass? Explain.
3. Was there a change in density? Why?
4. How was diffusion involved in your gummy bear’s change?
5. If your bear were surrounded by a cell membrane, what process would have occurred?

Five sentence paragraph: Answer the question; include data; was your hypothesis supported or not?