In this lesson, students will view salt under varied magnifications and begin to construct the understanding that materials may be composed of parts that are too small to be seen without magnification. They will observe salt with the naked eye, and then under a hand lens, microscope, and the electron microscope (the electron image is via the Internet). In order to complete this lesson, it is important that students have previous experience working with hand lenses and microscopes. This sort of detailed observation provides an opportunity for students to keep written records of their discoveries and analyze the collected data. As part of the process of recording and discussing observations, students will be required to make predictions and note differences.