Thanks Aurelia for sharing this project as part of the Young Marine Biologist Programme
Observation:
Day 1 : The seashell was thick and hard. Once it was placed in the vinegar, bubbles start to appeared around the shell.
Day 2 : The seashell was thinner and more transparent.
Day 3 : The seashell turned totally soft and it is thinner than paper.
From this experiment it shows that acid can damage the hardy seashell and possibly kill the shells animal in the sea.