Microscopes modified by the method outlined in this lesson plan give more detail about crystals and fiber than can be seen with a light microscope. However, the quality of the images will not be of the same quality as a commercial polarizing microscope. Identify samples of sand National Science Standard 1 is addressed by this activity. Dispose of materials as instructed by your teacher. Wash hands thoroughly before leaving the lab.
Ethanol is flammable.
Make sure there are no sparks or flame in the activity area. Silver nitrate will stain clothing and skin. Your teacher will provide you with five vials containing saturated solutions and clean slides. Label a slide for each solution. Using a micropipet, place 1 to 2 drops of each saturated solution on a slide.