Name: ________________________
Gummy Bear Osmosis Demo
Problem: How will the size (mass) of gummy bears be affected when placed in different concentrations of salt
solutions?
1. Identify the manipulated, responding and control variables in this experiment. List at least 2 control
variables. (SK1)
a. Manipulated Variable (MV) –
(What can we fill into our data table prior to data collection?)
b. Responding Variable (RV) –
(What will we be measuring?)
c. Control
(How can we show that changes in our dependent variable were due to changes in our independent variable?)
2. Write a hypothesis, for each solution, about the presumed relationship between the manipulated and
responding variables. (If…..then…..because) (SK1)
3. Fill in the data table.
Hypotonic Solution
Before
Mass (g)
After
Length (cm)
Mass (g)
Length (cm)
Gummy 1
Gummy 2
Hypertonic Solution
Before
Mass (g)
Gummy 1
Gummy 2
After
Length (cm)
Mass (g)
Length (cm)
Name: ________________________
4. Draw a diagram of the 2 beakers and one of the gummy bears. Use arrows to show the movement of
water. In point form and using key words (hypertonic, hypotonic, solute and solvent), explain,
what has happened to the gummy bear in each beaker. (C2)