What happens when you drop a rasin in glass of fresh champagne?

* Sink to the bottom: Raisins are denser than champagne, so they initially sink.

* Rise to the surface: As the champagne bubbles attach to the raisin's wrinkles and folds, they create enough buoyancy to lift it to the surface.

* Repeat the cycle: The raisin will continue to rise and fall, creating a fun and mesmerizing dance as it bobs up and down in the glass.

This is because of a few factors:

* Buoyancy: The bubbles clinging to the raisin create a layer of air, making it less dense than the champagne and causing it to rise.

* Surface tension: The surface tension of the champagne helps the bubbles adhere to the raisin's surface.

* Raisin shape: The wrinkles and folds on a raisin provide more surface area for bubbles to attach.

This effect is a fun demonstration of basic physics principles and is a classic party trick.