Crystal structure of water has opposing poles aligned; transition to gas phase appears incomplete
When decreasing the temp, the water molecules eventually settle to the bottom and into a formation. Unfortunately the arrangement has most of the molecules with partial positives facing each other and partial negatives facing each other. They also look like they are touching. If students sketch this it is going to require a lot of explanation of why it actually isn't that way, etc.
When heating the water to 100C, more water molecules bounce off the top of the "container" but most remain in the bottom half. Maybe I am misunderstanding but gaseous water should be expanding and filling the container more uniformly.
These problems pertain to Unit 1, Sim 3.