User login


Sweat Spot


Source Institutions

    The Exploratorium

Add to listGo to activity
Sweat Spot

In this activity, learners use a chemical reaction to visualize where moisture forms on the body. Learners use the Minor's iodine-starch test, a diagnostic test that doctors use to detect hyperhidrosis (excessive sweating), to identify where moisture is forming. Learners also use this method to test the effectiveness of different antiperspirants.

Quick Guide


Preparation Time:
Under 5 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$10 - $20 per group of students

Age Range:
Ages 8 - 18

Resource Types:
Activity, Experiment/Lab Activity

Language:
English

Materials List (per group of students)


  • Iodine tincture (available at pharmacies)
  • Cornstarch
  • Variety of antiperspirants and deodorants
  • Magnifying glass or dissecting microscope
  • Paper and pencils/pens
  • Cotton swabs (optional)

Subjects


  • Life Sciences
    • Human Body
      • Muscles and Skin
      • Medicine
  • Physical Sciences
    • Chemistry
      • Chemical Reactions
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations

Audience


To use this activity, learners need to:

  • see
  • see color
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other


This resource is part of:

Access Rights:

  • Free access

By:

  • Yu, Julie

Rights:

  • All Rights Reserved, Exploratorium, ©2007

Funding Sources:

  • National Science Foundation, 0610238
  • National Science Foundation, 0925383

Share


User Lists


This resource is part of these lists: