The info that I gain from these assessments is so important to me. It gives me a starting point for my instruction. It also gives me data that I can share with parents as we progress through the year. Like many of you, all this info goes into a giant binder. This binder has a tab for each student and most of the materials (such as extra recording sheets and various flash cards) I need to complete assessments.
Lewisite is primarily a vesicant (causing blisters). It secondarily irritates the lungs and is a systemic poison. Upon contact with the skin, it causes large, painful, fluid-filled blisters, especially on the extremities, back, and scrotum.
Cementite, also known as iron carbide, is a chemical compound of iron and carbon, with the formula Fe 3 C. Pearlite is a common micro structure occurring in many grades of steels. Pearlite is hard as well as strong because of the layered structure, and is used in a variety of applications.eople can identify pearlite by studying the structure of the alloy. Particularly, under a microscope, it has a very distinctive appearance created by the lamellar bands. Pearlite is around the middle of the chart in terms of strength when compared to other iron alloy phases.