Experiment of December 12, 2020:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

Experiment:

Question:

What happens to the raisin?

A) The raisin remains unchanged at the bottom of the measuring cup. Nothing happens.

B) The raisin is lifted to the surface of the water and sinks back down again.

C) The raisin is lifted to the surface of the oil and sinks to the bottom of the cup again.

D) The raisin is lifted to the oil surface and sinks back through the oil layer, but remains above the water layer.

Advice of the day:

Please make sure that you use sparkling water "classic" with a lot of carbonic acid. By the way, the wooden stick is only used to start the sultana from the very bottom, the sultana is not impaled. So you can also use a pen. It might be easier with a small, dry sultana.