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Learners blow into balloons and collect their breath--carbon dioxide gas (CO2). They then blow the CO2 from the balloon into a solution of acid-base indicator. The indicator changes color to show that CO2 gas in water forms an acid. This activity is part of a set of demonstrations and activities that can be used together for a larger lesson. Resource contains vocabulary definitions and suggestions for assessment, extensions, and scaling for different levels of learners.
- Under 5 minutes
- 5 to 10 minutes
- $1 - $5 per student
- Ages 8 - 14
- Activity, Experiment/Lab Activity
- English
Quick Guide
Materials List (per student)
- 1 small, round balloon
- 1 straw
- 1 small cup of ~50 ml of BTB solution (solution = 6 drops per 1/3 cup water)
- Hot Stuff! Activity 1 Worksheet
Subjects
-
Earth and Space Science
-
Earth Processes
- Weather and Climate
-
Earth Structure
- Atmosphere
-
Earth Processes
-
Engineering and Technology
-
Engineering
- Civil Engineering
- Environmental Engineering
-
Engineering
-
Life Sciences
-
Ecology
- Human Impact
-
Ecology
-
Physical Sciences
-
Chemistry
- Acids and Bases
- Solutions
-
Chemistry
Audience
To use this activity, learners need to:
- see
- see color
- touch
Learning styles supported:
- Involves hands-on or lab activities
Other
Components that are part of this resource:
Includes alignment to state and/or national standards:
This resource is part of:
Access Rights:
- Free access
By:
- Kolenbrander, Amy ; Yowell, Janet ; Mach, Natalie ; Schaefer Zarske, Malinda ; Carlson, Denise ; Kotys-Schwartz, Daria
Source Collection
- TeachEngineering
Rights:
- All rights reserved, Regents of the University of Colorado, 2004
Funding Sources:
- Fund for the Improvement of Postsecondary Education (FIPSE)
- U.S. Department of Education
- National Science Foundation, 0226322