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Learners see that a carrot slice sinks in fresh water and floats in saltwater. Considering the placement of the carrot slice in water and saltwater, learners infer that the density of salt water must be greater than the density of fresh water. As a challenge, learners adjust the density of the saltwater until they get the carrot slice to hover somewhere in the middle of the cup. [Activity is publicly available through a web crawler capture on Archive.org. Activity write-up only, images are unavailable.]
- 5 to 10 minutes
- 10 to 30 minutes
- 1 cent - $1 per group of students
- Ages 8 - 14
- Activity, Demonstration, Experiment/Lab Activity, Lesson/Lesson Plan
- English
Quick Guide
Materials List (per group of students)
- Water
- Salt
- Clear plastic cups
- Plastic teaspoon
- Carrot slices
- Student Activity Guide
Subjects
-
Physical Sciences
-
Chemistry
- Solutions
-
Structure and Properties of Matter
- Volume and Density
-
Chemistry
-
The Nature of Science
-
The Scientific Process
- Asking Questions
- Conducting Investigations
- Gathering Data
-
The Scientific Process
Informal Categories
- Food and Cooking
Audience
To use this activity, learners need to:
- see
- touch
Learning styles supported:
- Involves hands-on or lab activities
Other
Components that are part of this resource:
This resource is part of:
Access Rights:
- Free access
By:
- Kessler, James H. ; Galvan, Patricia M.
Rights:
- All rights reserved, American Chemical Society, 2007