Includes index. Magnetism is a force -- How magnets work -- Magnetic fields -- Let's investigate: working at a distance -- Magnetic materials -- Making magnets -- Electromagnets -- Let's investigate: electromagnetic challenge -- Machines using magnets -- Magnets on the move -- Let's investigate: floating pencil -- Investigate more -- Science challenge tips. "Budding scientists will love learning about the properties of magnetism by planning and carrying out investigations that explore how magnetic force is affected by distance, strength, and size."-- Ages 8-11.Grades 4 to 6.

1. Magnetism -- Juvenile literature.;