What do you exhale? Launch Lab Procedure

Name
Date
Class
Chapter 2 Lesson 4
Launch Lab
LESSON 4: 5 minutes
What do you exhale?
Does the air you breathe in differ from the air you breathe out?
Procedure
1. Read and complete a lab safety form.
3. In your Science Journal, record any
2. Unwrap a straw. Use the straw to
changes in the solution.
slowly blow into a small cup of
bromthymol blue. Do not splash the
liquid out of the cup.
Think About This
1. What changes did you observe in the solution?
2. What do you think caused the changes in the solution?
Key Concept Why do you think the air you inhale differ from the air you
exhale?
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Cell Structure and Function
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3.