If a raisin is dropped in glass of champagne it will sink and settle down the glass?

That's not quite right! A raisin dropped in a glass of champagne will actually rise to the surface. Here's why:

* Carbon Dioxide Bubbles: Champagne is highly carbonated, meaning it has a lot of dissolved carbon dioxide gas. When the bottle is opened, these bubbles form and rise to the surface.

* Raisin's Surface: The raisin has a rough surface, which allows bubbles to attach themselves to it.

* Buoyancy: As enough bubbles attach to the raisin, it becomes less dense than the champagne and is buoyed up, causing it to rise.

Once the raisin reaches the surface, the bubbles will detach and it will sink again. This cycle will continue, making the raisin appear to dance up and down in the glass.