Physical and chemical changes in the form of GAK

Eighth graders have been studying physical and chemical changes and physical and chemical properties in science class. As a summative activity, students made GAK following a certain formula.

During the experiment, students were watching for changes in matter as well as properties. Some groups were successful in making the product and some were not due to not following the procedures exactly. Students were able to evaluate their products and compare and determine what made each different. They also gave examples of properties of different materials used in the lab and changes that were observed.