The link below from www.skoool.co.uk is a fun interactive animation showing what happens to the particles of water when they are heated. Clink on the link below and use your mouse or touchpad to move the arrow to the left of the thermometer up or down to see what happens to the particles. Notice how the particles look and behave with or without heat (energy.)
http://lgfl.skoool.co.uk/content/keystage3/chemistry/pc/learningSimulations/COSSC/launch.html
