How is a balloon like a cell membrane? MiniLab Procedure

Name
Date
Class
Chapter 2 Lesson 3
MiniLab
LESSON 3: 20 minutes
How is a balloon like a cell membrane?
Substances within a cell are constantly in motion. How can a balloon act like a cell
membrane?
Procedure
1. Read and complete a lab safety form.
2. Make a three-column table in your
Science Journal to record your data.
Label the first column Balloon Number,
the second column Substance, and the
third column Supporting Evidence.
3. Use your senses to identify which
substance is in each of the numbered
balloons.
4. Record what you think each substance is.
5. Record the evidence supporting your
choice.
Analyze and Conclude
1. List the senses that were most useful in identifying the substances.
2. Infer if you could identify the substances if you were blindfolded. If so, how?
4.
Key Concept Explain how a balloon is like a cell membrane in terms of the
movement of substances.
50
Cell Structure and Function
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3. Describe how the substances moved and explain why they moved this way.