Name ____________________________________________ Date ___________ Period ______
Gummy Bear Osmosis
Problem: How will soaking Gummy Bear candies in distilled water
affect the size of the candy?
Hypothesis: ____________________________________________
_______________________________________________________
_______________________________________________________
Materials: (2) Beakers or cups, Ruler, Distilled water, Salt water, Paper towel, (2) Gummy
bears, Balance, Calculator
Procedure:
1. Use the masking tape to label 2 beakers/cups with your names and class period. One will
be labeled distilled water and the other will be labeled salt water.
2. Find the height and width of each of your 2 candy bears using a ruler. (do each one
individually)
3. Record descriptive observations about each candy bear.
4. Fill each beaker ½ way full of the appropriate water.
5. Put one candy bear in the distilled water and the other in the salt water.
6. Set the beaker aside for one day.
7. After the candy bear has soaked overnight, GENTLY take it out of the beaker and pat it
dry. Be very careful because the candy is now extremely breakable.
8. Repeat steps 2-4.
Data:
Gummy Bear 1
Before soaking
After soaking in
in water
water
Gummy Bear 2
Before soaking in
After soaking in
salt water
salt water
Height
Width
Mass
Descriptive
observations
*Percent
Change in
size
*Equation : (after soaking – before soaking / before soaking ) x 100 = percent change
Graph the percent changes on a bar graph.
Name ____________________________________________ Date ___________ Period ______
Analysis:
1. Using what we have learned in class, what happened to the candy after soaking in
distilled water overnight?
2. Why did you get these results?
3. What happened to the candy after soaking it in salt water overnight?
4. Why do grocery stores spray their fresh produce with water?
5. If stranded on an island, would it be advisable to drink salt water from the ocean?
Explain why or why not.