Fuel for Living Things
- Encourage the students to think of variations to the experiment, ask additional questions, and/or identify other examples of acids and bases.
- Assess students’ understanding of the experiment by having them write a paragraph describing the investigation and the results. Have them describe what caused the indicator solution to turn pink or green.
- Have students observe how humans exhale carbon dioxide by blowing through a straw into the indicator solution. They will see the solution turn a pink color, due to the presence of carbon.
Keywords: lesson | experiment | investigation | indicator solution | carbon dioxide | CO2 | acids | bases | pH scale | pH
- Moreno N., and B. Tharp. (2011). The Science of Global Atmospheric Change Teacher’s Guide. Third edition. Baylor College of Medicine. ISBN: 978-1-888997-76-7.
- Graphic of pH Scale by Christopher Burnett © Baylor College of Medicine.
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My Health My World: National Dissemination
Grant Number: 5R25ES009259
The Environment as a Context for Opportunities in Schools
Grant Number: 5R25ES010698, R25ES06932
Foundations for the Future: Capitalizing on Technology to Promote Equity, Access and Quality in Elementary Science Education