states of matter

Question 1

describe what happens to the particles when a solid changes state to liquid

Answer 1

-when a solid is heated, its particles gain more energy
-this makes the particles vibrate more, which weakens the forces that hold the solid together. This makes the solid expand
-At a certain temperature, the particles have enough energy to break free from their positions, which turns the solid into a liquid
-When a liquid is heated, again the particles get even more energy
-this energy makes the particles move faster, which weakens and breaks the bonds holding the liquid together
-at a certain temperature, the particles have enough energy to break their bonds. This is called evaporating and the liquids turns into a gas