Dancing Raisins


Setting Up


  • Pour fizzy water into a glass
  • Take the raisins out of the box






Predictions / What do you think will happen?

  • Talk to your partner
  • What might happen if we put the raisins into the fizzy water?
  • Record your ideas as a class on the board



Let’s try



  • Put the raisins into the fizzy water
  • Watch carefully what happens
  • Start to explain what you think is happening
  • Record your ideas on the board



What could we try next?



Now that you have explored this investigation what could you do next?



Record your thoughts on the blog




PREDICTIONS - What we thought would happen

OBSERVATIONS - What we saw happening

NEXT STEPS - What we could investigate next


























  • It will make the water bubbly. 
  • It will turn them brown.
  • They might get fizzy.
  • Raisins will go down to the bottom.
  • Raisins will break up.
  • Raisins will go pink and brown.
  • The bubbles are going up.
  • They will fall down.
  • The water will flow out.
  • I think they will float.
  • They will go up and down.













Why did the raisins "dance" in the fizzy water?

  • They go up and down
  • The fizzy is making them go up and down
  • They are moving in the water with the water helping them because it is so bubbly


Why didn't the raisins "dance" in the still water?

  • They go down and they don't come back up
  • They went down because its different water























  • I think the raisins might explode.
  • The raisins might disappear.
  • The raisins might come up.
  • The raisins are going up and down.
  • The air in the water is making the raisins going up and down.



  • If we wait a bit more the bubbles will go away and the raisins will stay down.








  • ‘They will float’
  • ‘They will bounce and dance’


  • 'Ooh, the fizz makes them dance’
  • ‘The bubbles are liquid’
  • ‘The bubbles make them go up and down’












  • I think they will keep moving about so they look like they are dancing'.
  •  ' They will start bobbing up and down.'
  • 'I think they will loose there weight and fall to the bottom and then start jumping.'



  • They are dancing because they have a bit of fizz on them, they keep bashing on the bubbles.'
  • 'The bubbles are pushing them up and down, like a wave.'
  • 'The water fizz is making them go up and down'




  • 'We could try in different liquids, like orange juice, milk or normal water.'
  • 'We could change what we add to the water.'















  • The raisins might break apart and make swirls.
  • They will look like they are floating.
  • The water might turn brown.
  • They will all sink to the bottom.


  • The water makes the raisins all frizzy.
  • The water is making the raisins all sugary.
  • The bubbles make the raisins bob up and down.
  • The fizzy bubbles are so strong they are pushing the raisins around, making them move.



















  • We predict that the raisins will either get smaller or bigger.
  •  They will probably go either up or down like dancing.
  •  It might explode
  •  It might fizz
  •  The water might go up
  •  The raisins might wobble all over the place and dance.
  •  The raisins might go dancing around.




  • The raisins are dancing in the fizzy water
  •  The raisins are getting bigger
  •  The water is fizzing more when the raisins are in the glass
  •  The floating up and down
  •   The gas was making bubbles and that was helping to lift up the raisins
  •  The bubbles pop when they get to the top and the raisin sinks back down to the bottom of the glass.
  • We would change the raisins to blueberries
  •  Change the water to lemonade, coke, cherryade or Tango.























  • They will go up and down in the fizzy water.
  •  They will go side to side.
  •  They will just float on the top.
  •  They will just sink.
  •  They will go up and down and then jump out of the fizzy water.
  •  They will spin around.
  •  Make a splash


  • The raisins rise because of the bubbles and then the bubbles pop at the top and the raisins sink again.
  •  The raisins dance because of the different pressures in the fizzy water.
  •  Air bubbles push the raisins up to the surface.  


  • Chopped up apples in water. 
  • Put in only a few at a time. 
  • Add sugar to the mixture. 
  • Use apple juice or strawberry












  • The raisins would float
  • The raisins would just sink
  • The water would go dirty
  • The raisins would swell up because of the water
  • The raisins would go small in the fizzy water




  • The raisins had bubbles on them
  • The raisins went up and down
  • The bubbles popped
  • The water went a little dirty






  • Use mints instead of water because you can get flavoured water
  • Try the investigation with milk because it is good for you
  • I would use peas instead of raisins because they are dry Would the water be able to raise heavier raisins?











  • We think the raisins will float, of the water.
  • We think the water will overflow, when you add the raisins.
  • We think the raisins might dissolve




  • The raisins moved up and down in the water.
  • Bubbles formed on the outside of the raisins and lifted them to the top. When the raisins reached the top, they sank back to the bottom of the cup




  • Try with different raisins.
  • Change the size of the cup.
  • Change the amount of liquid.
  • Add more raisins.
  • Try tap water
  • Change the container, and use a lid.
















  • Jason had already seen this experiment on the Internet. He knew that the raisins would go up and down in the water (dance).
  • Bailey said that once the raisins floated up to the top of the water, they would come back down, because the gas bubbles were popping on the surface.





  • What 4AS weren’t sure about was why the bubbles were sticking to the raisins to begin with, but they did think it had something to do with the sugar content of the raisins.









  • They did suggest other investigations that could be done, such as using Coca-Cola to see if more sugar would affect the ‘dancing’ rate of the raisins.

















  • They will make a popping noise!
  • The raisins will spin and then move up and down
  • They will swirl.
  • They will get bigger.




  • It is fizzing!
  • Is it acid?
  • There are bubbles! The bubbles are collecting around the raisins and making it move up and down.
  • Its a gas!



  • Try lemonade or a different drink like squash.
  • Try a different food like grapes or smarties.
  • Try mixing drinks and see if it is any different 






















  • The raisins will float to the top because the gas, which is carbon dioxide, will make the raisins lighter and lift them.
  • The raisins will sink to the bottom because they are heavier that the water.
  • The raisins and the gas will cause a chemical reaction and the raisins will explode. 







  • The raisins were going up and down because the bubbles are full of gas and air and air rises to the top of the water.
  • -The raisins sink to the bottom and then bounce off the air bubbles and then it goes in a scientific loop until there are no more air bubbles at the bottom of the glass. 
  • The raisins were "dancing" because the bubbles have gas inside them which causes them to rise to the surface.  When they hit the surface, the bubbles pop and the raisins sink to the bottom again.
  • We could try testing other dried fruits and see if it has the same effect.
  • We could try using fresh fruit to see if there is any difference between using fresh and dried fruit.
  • We could try with other carbonated drinks to see if it has the same effect and to see if drinks with more sugar make a difference.



















  • 'I think the raisins will jump out of the glass and land back in the glass'. 
  • 'I think the raisins will change back into grapes'. 
  • 'I think the raisins will all sink to the bottom and then all rise back to the top'




  • 'The bubbles cling to the raisins and pull them to the top'
  •  'The raisins float because they are full of air and then sink becuase they fill up with water.'
  •  'The bubbles pop at the top and that is why the raisins sink back down again'



  • 'Do it again using different drinks like coke, juice or still water.'
  •  'Squeeze the glass.'
  •  'Tilt the glass.'