We have been learning about how do things float and sink.

Sink or Float ?

Object	Pred ~iction s-sink     i- in between      f-float	Result
coke	s	sink
diet coke	f	floats
candle	i	in between
apple	f	floats
lemon	f	floats

Why do some things float while others sink?

If the thing is heavier then it will sink, but if it is lighter then it will float.