Changes of state
Melting
When a solid is heated the Choose an item. goes to the
particles.
It makes them Choose an item. more and more.
Eventually, the Choose an item.forces between the
particles (that hold them together as a solid) are Choose
an item. and the particles are able to move around. The
solid has now Choose an item..
Boiling
When a liquid gets hot enough, the particles have enough Choose an item. to overcome the Choose an item. and
escape each other. Bubbles of Choose an item. form inside the liquid as the particles break away from each
other. This is Choose an item..
Condensing
As a gas cools down it loses Choose an item. to the surroundings and the temperature falls. Eventually the gas
particles get Choose an item. together and Choose an item. forces are made between the particles. As these
forces are made, energy is given out in the form of heat and the temperature stops falling.