The Dancing Raisin Experiment

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by akillilea
Last updated 5 years ago

Discipline:
Science
Subject:
Experiments
Grade:
3,4

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The Dancing Raisin Experiment

The Mystery of the Dancing Raisins

Our Question

Method

What will we do?

?

?

Our Equipment

My Prediction

What I think will happen

Will the raisins sink or float when placed in a glass of a carbonated liquid? Why?

Results

What will happen? Why?

The raisins first sink to the bottom. Then watch closely. After a few seconds, they will float to the top, and then sink again. Why this happens: Raisins have more density than the liquid, so they sink to the bottom. But the carbon dioxide air bubbles stick to the surface of the raisin as they rise up through the liquid. When they stick to a raisin, they give it extra buoyancy, causing it to float to the top. When the bubbles detach from the raisin, it sinks again.................................................................................................................................................................................................

How can we make raisins dance in liquid?

Fill a tall clear drinking glass with a clear carbonated beverage (such as soda water, 7-Up or Sprite). Drop a few fresh raisins into the glass and observe.

1. One tall clear glass filled with a clear carbonated beverage (such as soda water, 7-Up or Sprite)2. A few fresh raisins


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