University of Hawai'i
Univ. Of Hawaii: The Effects of Gamma Rays on Mars Rocks
This site from the University of Hawaii describes the results of experiments to use gamma rays to sterilize rocks from outer space.
Georgia Department of Education
Ga Virtual Learning: Nuclear Physics and Elementary Particles
This interactive unit will take students up close and personal with the nuclei of atoms as they discover some of their more intimate process. These will include radioactive decay, nuclear fission, and nuclear fusion.
NASA
Nasa: Imagine the Universe: X Ray, Gamma Ray Astronomy
Frequently asked questions are answered about gamma rays.
CK-12 Foundation
Ck 12: Physical Science: Gamma Decay
[Free Registration/Login may be required to access all resource tools.] Explains how and why gamma decay occurs, what gamma rays are, and why gamma radiation is the most harmful.
Soft Schools
Soft Schools: Radioactivity Quiz
Take an interactive quiz over radioactivity. After completing the quiz, check your score, and then revisit any incorrect question for further review.
NASA
Nasa: Imagine the Universe: Gamma Rays From Supernovae and Supernova Remnants
Astronomers use gamma decay to study the lives of the stars.
Science Struck
Science Struck: How Does Radioactive Decay Work?
Explains the processes of radioactive decay in primary and secondary modes.
CK-12 Foundation
Ck 12: Physical Science: Radioactive Decay
[Free Registration/Login may be required to access all resource tools.] What radioactive decay is and the three different types. How it changes one element to another and its dangers.
Khan Academy
Khan Academy: Radioactive Decay Types Article
This article from Khan Academy provides information about radioactive decay. This information is intended for the Class 12 Physics Course (India).
Lawrence Berkeley National Laboratory
Berkeley Lab: Gamma Decay
A brief explanation of the process of gamma decay is provided.
Lawrence Berkeley National Laboratory
Berkeley Lab: Basic Nuclear Science Information
Site provides the ABC's of nuclear science including radioactivity and gamma decay to fission and comic rays.
Shodor Education Foundation
Shodor: Nuclear Chemistry
This site provides formulas and examples that deal with Nuclear Chemistry. It also has practice problems.
Other
World Nuclear Association: Radiation and Life
This article presents illustrations and a general discussion about radiation.
Idaho State University
Idaho State University: Gamma Radiation
A good illustration and a simple explanation of gamma-ray decay.