The time it takes for it to damage half of someone's cells. Sometimes radiation can be put to good use. The R.A.D. -Radiation Amount Detector. A terrible nuclear disaster happened in April of 1986. Radiation can kill.
Radiation can build up over time.
They could endanger themselves and others. Animals and plants contain a known proportion of Carbon-14. More will be added as time permits. If you find errors or see need for additions, please contact us at the e-mail address provided at the bottom of this page. This site and these worksheets are in no way associated with nor endorsed by Dorling Kindersley.