Name_____________________ Date____________ Period______
Observing Osmosis: Gummy Bear Lab
In this activity, you will investigate the affect of water and solutions on objects, using gummy
bears.
Question: What effect does soaking Gummy Bear in water and salt water have on the size of
the candy?
Hypothesis: (If…Then statement)
__________________________________________________________________________
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Day 1 Lab Procedure:
1. Write your group members names on the 2 pieces of masking tape.
2. Place your tape on your cups.
3. Using your metric ruler measure the height (how tall) and the width (across).
4. Record the height and weight in the data table.
5. Using digital scale to find the mass of your gummy bear.
6. Record the mass in the data table.
7. Record descriptive observations (how it looks, feels, smells) about the gummy bear.
8. Repeat measurements for gummy bear B.
9. Put 1 gummy bear in container A with water covering the bear and set aside.
10.Place the second gummy bear in container B with saltwater covering the bear and set
aside.
11. Leave over night.
Day 2 Lab Procedure:
1. Gently remove the gummy bear from the water (cup A). Be very careful because the
candy is extremely fragile. DO NOT EAT THE CANDY!!
2. Using your metric ruler measure the height (how tall) and the width (across at the widest
part).
3. Record the height and weight in the data table.
4. Using the triple beam balance find the mass of your gummy bears.
5. Record the mass in the data table.
6. Record descriptive observations (how it looks, feels, smells) about the gummy bear.
7. Repeat the process with gummy bear B.
Data Table:
Day 1:
BEFORE
Height(cm)
Day1:
Observations of Both
Gummy Bears
Day 2:
AFTER
Day 2:
Observations of Both
Gummy Bears
DO NOT WRITE IN THIS SECTION
Water
Salt Water
Width(cm)
DO NOT WRITE IN THIS SECTION
Water
Salt Water
Weight (g)
Water
Salt Water
DO NOT WRITE IN THIS SECTION
Differences:
Difference between
Day 1 and 2 (subtract)
Data Analysis:
Graph the height and weight of both bears before and after on a bar graph. Remember:
title, labels, numbering and color!
Conclusion Questions: Must answer in complete sentences!!!
1- What happened to the candy after soaking in water overnight? ______________________
Why? ___________________________________________________________________
2- What happened to the candy after soaking in saltwater overnight? ___________________
Why? ___________________________________________________________________
3- How did the addition of salt change the movement of water? ________________________
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4- Would this happen if you put the gummy bear in kool-aid? _______ Why or why not? ______
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5- What is osmosis? ________________________________________________________
6- How does this lab illustrate osmosis? _________________________________________
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7- Draw a picture illustrating the movement of the water in cup A on (1) Day 1 and (2) Day 2.
Label what is occurring in each picture.