Follow these instructions, to react vinegar with eggshells and make a naked egg (an egg without a shell)! Eggshells are made of a substance called calcium carbonate, which is the same material the stone gargoyles are made of. The eggshell and vinegar reaction models the reaction between stone gargoyles and acid rain. Try the experiment, and then:
Draw a particle model that shows what happens to the eggshell in the vinegar.
Pour the vinegar (with the dissolved shell) onto a flat surface (petri dish, plate). Allow the vinegar to evaporate and see what is left behind!
In the Performance Task, students complete the final revision of their Alchemist Argument. They create a particle model showing the reaction between the stone gargoyle and acid rain to support their argument.
In this performance task, students use their evidence chart to revise their final argument about what happens to the stone gargoyles over time. They create a particle model to show what is happening in the reaction between acid rain and the stone gargoyles to support their argument. If you have time to extend the performance task, there is a hands-on investigation in the Extensions.
Step 1: Plan ahead
Students will need their completed The Alchemist Argument Evidence Chart that they have been adding to after each Mystery.
Students will also need their first The Alchemist Argument worksheet that they completed during the introduction to the anchor phenomenon.
Develop a model to describe that matter is made of particles too small to be seen.
Measure and graph quantities to provide evidence that regardless of the type of change that occurs when heating, cooling, or mixing substances, the total weight of matter is conserved.
Make observations and measurements to identify materials based on their properties.
Conduct an investigation to determine whether the mixing of two or more substances results in new substances.
