Density

Density- how much matter is packed into a specific volume. Do you think a mini-marshmallow is very dense? Will it float in your hot chocolate? What about a cube of sugar that's about the same size as a mini-marshmallow? Sink or float?

Does it matter if you have a bigger marshmallow?

What happens if you smush all the air out of the marshmallow?

There would be the same number of atoms, but in a smaller amount of volume (amount of space), so it would be much more dense. Now would it sink or float?

Go try it out!