Curated OER
The Radium Girls
For this radium worksheet, 7th graders determine the substance used to make the dials of watches glow in the early 1900's. Then they explain why radium glows and what the three most common types of emissions from radioactive nuclei and...
Lawrence Berkeley National Laboratory
Berkeley Lab: Radioactivity in the Natural Environment
Charts take a look at radioactive nuclei found naturally on Earth.