Diffusion+Lab

__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. 8. Write a conclusion. __Question__: What do you think will happen to a stale bear when you put it in water over night?
 * || Day 1 || Day 2 || Difference ||  || Procedure: ||
 * Bear Color ||  ||   ||   ||   || 1. In pencil, write your bear’s name on a paper scrap and put it in the jar. ||
 * Length ||  ||   ||   ||   || 2. Read the question and write a hypothesis. ||
 * Width ||  ||   ||   ||   || 3. Measure the length, width, height, and mass of your bear. Put it in water. ||
 * Height ||  ||   ||   ||   || 4. Calculate your bear’s volume. Length x width x height = volume ||
 * Mass ||  ||   ||   ||   || 5. Calculate your bear’s density. Mass ÷volume = density ||
 * Volume ||  ||   ||   ||   || 6. The next day, repeat steps 3, 4, & 5. ||
 * Density ||  ||   ||   ||   || 7. Answer the analysis questions. ||

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

__Analysis__: 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?

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