Why beans move as the water boils explain by conduction?

Answer 1

I think you meant convection.

When water is heated it expands, this lowers its density and will cause it to float on the heavier colder water. Convection is the movement of the hot water to the top while the cold water moves down wards. the beans is just moving because the water around it is moving.

If you heat a beaker of water from the bottom the bottom water will therefore move upwards and the cold water down to the bottom.

That is why if you dive into a deep water such as a deep swimming pool you will very quickly feel how the temperature lowers as you go down (please don't drown yourself) this is because the cold water is heavier and will therefore sink to the bottom.

The wet beans probably have a density that is very close to that of water so when beans are in hot water it will sink and will float in cold water (?).

Hope this helps.