User login


Operation Espionage


Source Institutions

    WGBH

Add to listGo to activity
Operation Espionage

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.

Quick Guide


Preparation Time:
10 to 30 minutes

Learning Time:
45 to 60 minutes

Estimated Materials Cost:
$1 - $5 per group of students

Age Range:
Ages 6 - 11

Resource Types:
Activity, Experiment/Lab Activity

Language:
English, Spanish

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
  • Physical Sciences
    • Chemistry
      • Chemical Reactions
      • Acids and Bases
  • The Nature of Science
    • The Scientific Process
      • Asking Questions
      • Conducting Investigations
      • Gathering Data
      • Formulating Explanations

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


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

Share


User Lists


This resource is part of these lists: