When the water has evaporated look at the bottom of the container. Discuss how the method of obtaining solar salt in this experiment is the same or different than that done in a large solar salt production facility. Ask students why the oceans are a virtually limitless resource for solar salt production. Assessment Students can create daily drawings of the salt crystal solution in a notebook, or take daily photographs. A bulletin board display can be created from these illustrations.
Students can also obtain more detailed information about salt processes from the Internet.
The lesson can be concluded by having students use the Major Salt Deposits Map to locate the salt deposit nearest their community. Discuss the geological history of the area and how it may have contributed to salt deposit formation.