Examines the different physical and chemical properties that can exist as solids, liquids, or gases and discusses chemical changes, separating chemicals, crystals, acids, and alkalis.
Presents an introduction to the Earth, discussing its origin, geographical features, oceans, rotation, climate, and atmosphere, and including a related activity.
Examines the relationship between electricity and magnetism, where they occur in nature, how they produce electric current, and how electromagnets work.
