Provides information about the chemical element lead, explaining what it is, its characteristics, where it is found, how it was discovered, and how it is extracted and used.
Provides information about the chemical element chlorine, explaining what it is, its characteristics, where it is found, how it was discovered, and how it is extracted and used.
Describes the discovery, versatility and other special characteristics, various uses, and affect on the human body of this most common metal in the world.
Explores the history of the nonmetallic element phosphorus and explains its chemistry, its reactions with other substances, its uses, and its importance in our lives.
Describes what air is, discusses air particles and weight, wind and motion, and air's benefits for the earth. Presents instructions for an air-weighing experiment.
Provides information about water, explaining what it is, tracing the water cycle, and discussing water use and quality. Includes a related activity that demonstrates the different forms that water can take.
