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In this demonstration, learners compare and contrast regular water ice to dry ice (frozen carbon dioxide). Both samples are placed in a solution of acid-base indicator. The regular ice floats and the acid-base indicator does not change color; the dry ice sinks and the acid-base indicator changes color to show an acid solution has formed. This demonstration 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 group of students
- Ages 8 - 14
- Activity, Demonstration
- English
Quick Guide
Materials List (per group of students)
- 2 medium-size beakers, each half full of bromothymol blue (BTB) solution (solution = 6 drops per 1/3 cup water)
- 1-2 small pieces of ice (cubes)
- 1-2 small pieces of dry ice
- Hot Stuff! Activity 1 Worksheets
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
-
States of Matter
- Changes of Phase
-
Chemistry
Audience
To use this activity, learners need to:
- see
- see color
Other
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