NAME_______________________________________DATE___________PERIOD______
HONORS GUMMY BEAR OSMOSIS
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What is the effect of _______________________________on the average
percent change in mass of gummy bears?
1. Define osmosis.
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2. From the video you saw in class, what happens to Gummy Bears when you put
them in water for an extended period of time? Why?
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Use 2 different liquids and 2 trials (gummy bears) per liquid.
On Day 1 you need to mass the gummy bears before soaking them in liquid. This
is your initial mass.
Be very careful when removing the gummy bears on Day 2. The gummy bears may
be very fragile. The mass on Day 2 is your final mass.
To calculate % change in mass: final mass - initial mass X 100
initial mass
Materials and Procedure do not need to be included unless you do something
other than the suggested procedure.
Do include the amount of liquid used for each trial.
Suggested procedure
o Day 1 - Label cups. Mass gummy bears. Place gummy bears in liquid
overnight.
o Day 2 - Carefully remove gummy bears. Mass gummy bears. Calculate data.
EXPERIMENTAL DESIGN DIAGRAM
Amount of liquid used________________________________________________
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Your data table should include a title, the initial mass, the final mass, % change
in mass, the average % change in mass and observations about your gummy bears
(for example color changes, was it fragile on Day 2)
Please include a bar graph on a separate piece of paper which compares the
average % change in mass of the gummy bears in the different liquids. Please
refer to your graphing handout for requirements.
NAME___________________________________DATE_________PERIOD__________
PLEASE ANSWER IN COMPLETE SENTENCES
1. Restate your hypothesis.
2. Do you accept or reject your hypothesis based on your data? Why?
3. Explain the results of your experiment based on your knowledge of osmosis.
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4. Were there factors or errors that may have affected the results of your
experiment other than the independent variable? Please explain.
5. Reflection
a. If you were to repeat this experiment, how would you improve it?
b. If you were to design another experiment based on this one, what would
be the problem? Why would you want to investigate this problem?