If you mean when the number of water molecules increases in an area, then it becomes heavier, by volume.
But if you mean when it cools down and becomes ice, then it becomes a crystalline structure and it actually expands and thereby becomes lighter than the surrounding area and floats.
Sorry for two answers, I wasn't sure what exactly you meant.
:)
The water gets cooler
What happens to the water molecule is when it is evaporated, it is being bounced around. Then, when the water molecules are rubbing together, that creates friction, and friction creates energy, that energy is the lightning. Next, when the cloud is collection water, it gets denser and denser, and when it is very heavy, the water just falls out because the cloud can't carry anymore.
they sink
I think it sinks toward the ocean floor.
It gets colder and denser - it is at its densest at about 4 degrees centigrade. If the water gets even colder then it will freeze and ice will form. As this happens the molecules actually move further apart (water ice is unusual in that the solid form of water is less dense than the liquid form - which is why ice floats).
This is an unusual question. Nothing qualitative really happens upon its increase in density and this is quite a difficult thing to do: mere fluctuations in temperature and pressure (even immense changes) can shift water's density by as much as only 3%. Water is most dense between 4 and 5 degrees celsius. There is a drop in density below this (even when supercooling the water).
It gets colder because the Sunlight heats the ocean and the deeper you go, the less penetrating the Sunlight is, therefore making the ocean water colder.
The boat will rise because salt water is denser than river water.
salt water is denser
The particles get further away from each other as water is heated therefore making it less dense
im asking the question, what happen when water gets in brain
it gets cooler