For example, the half-life of Iodine 131 is eight days, but for Uranium 238, which is present in varying amounts all over the world, it is 4.5 billion years. Potassium 40, the main source of ...

Cause and Effect: Understanding the causes of radioactive decay and its effects on materials and organisms. (Example: Exploring how distance and shielding materials affect exposure to radiation.) ...

Always be specific in what you write, for example: exposure to UV can lead to skin cancer but not other forms of cancer to protect from the effects of UV, it is important to use high-factor ...

Multiple choice questions will appear throughout both exams papers (Breadth and Depth), and at both Foundation Tier and Higher Tier. These questions provide you with a number of answers, from ...

The benefits of radiation and radioactive material used in our society are inarguable. Radiation and radioactive materials are used at the University of Nevada, Reno in education, medicine, and ...

Elusive black hole radiation predicted by Stephen Hawking may have influenced the way the universe took shape after the Big ...

This process, whereby species evolve rapidly to exploit empty ecospace, is known as adaptive radiation. In his memoir, The Voyage of the Beagle, Darwin noted, almost as if in awe, "One might ...

The idea of ecological opportunity acting as the trigger of adaptive radiation has been demonstrated in numerous examples using both living and extinct organisms. Ecological opportunity permits a ...