Because of gravity, the cooler, more dense water sinks to the bottom of the container and the heated water rises to the top due to buoyancy.
(more dense water; sinks; to the bottom of the container) Context(more dense water sinks,List([32, 54))):(the heated water; rises; to the top due to buoyancy)
more dense water sinks,List([32, 54))
more dense water the heated water
sinks rises
to the bottom of the container
to the top due to buoyancy