Nuclear power provides about 20 percent of the energy generated in the United States. The seventh activity in the series of 12 tackles nuclear power. After sharing what they know about nuclear energy, scholars complete a...

Radioactive pollutants can enter the body through ingestion, inhalation, absorption, or injection. The last lesson in a series of 36 introduces pupils to radioactive pollution. They study its sources, both natural and man-made, its...