In my second year at school, we were told that water froze to become ice and that ice could melt to become liquid. I thought that liquid must somehow be different to the water it once was and would be very reluctant to ever drink it.
A childhood belief about chemistry

others believed things like this
- I thought tonic water was toxic water and wondered why would anyone drink it if it is toxic?— Dr.Badguy
- To clean the goldfish you put washing up liquid into its bowl.— Sev
- When I was young I refused to drink well water because I thought it came out of whales.— itodd
- I used to believe that the reflection at the bottom of cup of liquid was a crocodile waiting to gobble me up.— Aaron
- I used to believe that arson was a flammable liquid, not the act of deliberately setting fires.— Joey Schwartzman
- I used to believe the Golden Calf produced liquid gold instead of milk.— Trisha