Home : Structures : Liquids
In the last lesson we saw that everything is made of particles
which are constantly moving. We also found out that many of these particles are held together by bonds.
If the bonds are very strong then the particles can't move around much - and they form a solid.
Liquids are also made out of particles - and these particles also have bonds between them. However the bonds that hold liquid
particles together are much weaker than those in solids.
The particles in a liquid are always moving but they move around a lot more than in a solid.
The liquid takes up the shape of the container that it is placed in; it will flow if the container is tilted;
and the liquid can be poured into another container
Liquids are half-way between solids and gases. If you give the particles in a liquid
some energy (such as heat) then they might be able to change into a gas ... evaporation.
On the other hand, you can take some energy out of a liquid it may change into a solid ... freezing.
The particles in a solid have the least energy; gas particles have the most energy; and liquid particles are
somewhere in between.