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Physics. Botany. Zoology. Astronomy. Webquests. Meteorology. Life Science Topics - Fifth 5th Grade Science Standards at I4C. VirtualTours. Sites - Free websites and wikis. Meaning of Halflife. I'd like to illustrate what this really means.

Meaning of Halflife

If living creatures had halflives the way radioactive atoms do, the world would be a very different place. What do you mean? Suppose there's an alien species with a halflife of, say, 70 years. You randomly pick out 16 baby aliens and track them to see how long they live. After 70 years, of course, 8 of them will still be alive. Science. School Friendly science websites. Chemistry. Science websites.