I can write the story itself, but I need help choosing a material that can undergo the process for the thermal changes and can explain how the molecules are affected.

Your task is to create a presentation to explain the transformation of a substance as it changes phases. You may choose to write a story or create a comic strip. For your story or comic, you will create a main character and detail the adventure as your character is exposed to thermal energy, causing it to undergo phase changes from a solid, to a liquid, to a gas.