This is a simple illustration of what particles do !!! WARNING : IF PARTICLES ARE STUCK IN THE SAME POSITION THEN PRESS THE GREEN FLAG AGAIN Particles bounce off of each other and the walls of the object the particles are in E.g. a solid, liquid or gas In this illustration, the particles are a gas (See below on a particle formation for gas) If you press the heat button - the particles will move faster. This is because the heat gives energy to the particles. Just like if you drink a fizzy drink, you go all hyper because the energy has converted from the drink to you. Then, you will se that the particles are becoming faster, each time you press the heat button. Particle formations : Gas : The particles are randomly moving quickly around, bouncing into the walls and the other particles Liquid : The particles are in columns and rows but are randomly bouncing off other particles, these particles are moving slowly Solid : The particles are in rows and columns and are not moving at all. Hope you understand everything, please ask if you don't : ) Hope you enjoy