Operation Espionage
Source Institutions
-
WGBH
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In this activity, learners create and reveal secret messages written with invisible ink! The invisible ink is actually a baking soda solution, and the magical revealing liquid is fruit juice. The end result is an acid-base reaction that everyone can have fun with and learn more about chemical reactions, while using the scientific process.
- 10 to 30 minutes
- 45 to 60 minutes
- $1 - $5 per group of students
- Ages 6 - 11
- Activity, Experiment/Lab Activity
- English, Spanish
Quick Guide
Materials List (per group of students)
- 1 tsp. of baking soda
- Water
- 3 bowls, filled halfway with purple grape juice, grape juice concentrate, and cranberry juice, each labeled
- 1 bowl filled halfway with water and a drop of red and blue food coloring, labeled
- 1 spoon
- Cotton swabs
- Cotton balls
- Cup
- Paper
- Pencil
- Paper towels
Subjects
- Engineering and Technology
- Engineering
- Chemical Engineering
- Engineering
- Physical Sciences
- Chemistry
- Chemical Reactions
- Acids and Bases
- Chemistry
- The Nature of Science
- The Scientific Process
- Asking Questions
- Conducting Investigations
- Gathering Data
- Formulating Explanations
- The Scientific Process
Informal Categories
- Arts and Crafts
- Crime Science
Audience
To use this activity, learners need to:
- see
- see color
- be mobile
- touch
Learning styles supported:
- Involves teamwork and communication skills
- Links STEM to other topics of interest such as arts and humanities
- Uses STEM to solve real-world problems
- Involves hands-on or lab activities
Other
Foreign language versions of this resource:
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:
- WGBH
Source Collection:
- FETCH! With Ruff Ruffman
Rights:
- All Rights Reserved, WGBH Educational Foundation, ©2008
Funding Sources:
- National Science Foundation, 0714741
- Public television viewers
- Greendog
