observe, communicate, explain, infer Materials: 4.1.1 none 4.1.2 bar magnets 4.2.1 (per group) bar magnet, ring magnet, horseshoe magnet, small paper clips, 1 sheet of lined paper, Activity Bank 4.3.3 (per group) bar magnet, small paper clips, Activity Bank 4.3.3 (per group) paper lunch bag, metal objects, nonmetal objects, magnet, string, pencil, Science Journal 4.3.3 different-shaped magnets 4.3.3 small ring magnets, pencil 4.6.2 none 4.6.1 bar magnet, paper clip, large iron nail, pencil, Activity Bank 4.6.1 (per group) bar magnet, string, paper clip, index card, Science Journal Assessment: Pretests: Chapter 8 Pretest, p. 15 Pupil Edition: Chapter 8 Review, p. 190;