Modern Chemistry, Lesson 140: Iron

Duration: 30 min

Creator: Encyclopaedia Britannica Educational Corporation

Description: Begins a series of lessons on the chemistry of iron, which serve as a review of many of the principles of chemistry developed in the course. Demonstrates loss of magnetism by heating a nail in the field of a permanent magnet. This same effect is demonstrated by heating a spring wire electrically; at the same time the expansion and contraction of wire is shown at this transition point.

Metadata Source:Catalog of Classroom Teaching Films for Georgia Schools, No. 10 (Georgia Department of Education)