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Description

Dancing Raisins

Resources

• Club Soda or another clear soda (e.g: 7-Up, Sprite) - unopened is best
• separated raisins – fresh raisins work best
• an empty glass

Instructions

Drop a few raisins into a glass of soda and watch.

Introduction
What are dancing raisins?
When you first drop the raisins in the soda they sink to the bottom of the glass because they are more dense than the soda.
The carbonated soda releases carbon dioxide bubbles and these bubbles love to attach to the rough surface of the raisins.
They act like tiny floatation devices that lift the raisin to the surface of the water.
This is due to an increase in buoyancy.
Once the carbon dioxide bubbles reach the surface of the soda they pop and the gas is released into the air.
This makes the raisin lose buoyancy and fall back down to the bottom of the glass.
This continues until all of the carbon dioxide has escaped and the soda is flat.

Instructions
• Fill a glass with soda.
• Drop raisins into the glass. What happens? Do they sink or float?
• Then sit and watch what happens. You may need to be patient. It can take a minute or two for them to start moving.


Acknowledgement/Source
https://funlearningforkids.com
Spring Trefoil News 2019

Attachments/Template needed for activity?
None

Tags

• dancing raisins
• float
• ladybird games for fun
• raisins
• science
• sink
• soda
• STEM
• Trefoil News Spring 2019
• Water games

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