This grade 7 science lesson was designed for students to demonstrate their understanding of how molecules are made of atoms by sharing their valence electrons. Previous to this lesson students learned how to read the periodic table to determine the subatomic particles of elements. Each group was given a simple molecule and their task was to explain and show their thinking in a mini lesson. Students showed how to use the periodic table to determine the atomic composition of a molecule. Upon completion of the projects, groups worked together to self assess their project using a rubric that was given to them prior to beginning the lesson. This way they were aware of their goals and used those goals to guide their thinking throughout the project.
- Develops models to describe the atomic composition of simple molecules and extended structures.
- Develops and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.