Rising Raisons – Why do things sink?

Rising raisons – Why do things sink?

This project is a really simple chemistry project to do. It is easy and you only need a few basic materials: 2 plastic bottles or glasses, Water, lemonade and some raisons.

Q: Why does a raison sink in water however will rise in lemonade?

A: Even though both glasses look the same the raison react differently due to buoyancy and density. The raison in the water will sink and stay at the bottom of the container, whereas the raison in the lemonade will sink then will rise to the top because the raisons are denser than the liquid. The lemonade carbon dioxide molecules stick to the wrinkles on the raisons. causing them to have increased buoyancy and rise. When the bubbles pop it will start to sink again – and so on.

How to make.

Level: Easy.

Cost: Little.

Enjoyment: We had Lots of fun with this experiment. The boys were very impressed and we all really enjoy watching.

Time: Approx 5- 20 minutes.

You will need: 

  • 2 plastic bottles or glasses.
  • Some water.
  • Some Lemonade.
  • 20 raisons.

To do: 

  1. Fill your chosen containers – one with water and one with Lemonade.
  2. Drop in 10 raisons to each container.
  3. Watch and see what happens.


Enjoy emmas xxx

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