Dating rocks the halflife of uranium238 is 4500 million years when it decays it forms thorium234 which is also unstable finally after a series of radioactive isotopes are formed it becomes lead206 which is stable the age of the rock can be calculated if the ratio of uranium to lead is known.
Learn about radiation and how it is used as well as the waste and dangers with bbc bitesize gcse physics homepage radioactive decay is used in carbon dating.
A report about the decay and halflife of different radioactive search the bbc search it could lead into a discussion of the example of carbon dating links.
Span classnews_dt12042012spannbsp018332this higher gcse bbc bitesize video is from the original programmes from 2000 that were broadcast on bbc2 it covers the areas of the physics higher paper.
Radioactive tracers are used to follow the flow of a substance through a system the gamma camera shown opposite can show where a patient has absorbed a tiny amount of radioactive substance doctors can tell from the image obtained how well particular organs.
The radioactive dating game by mala l radhakrishnan i used to sleep til my electrons would drool at p32 elementary school the things we were taught were just totally boring a mole of us atoms would always be snoring.
Span classnews_dt12032016spannbsp018332what is radioactivity halflife and radioisotopes gcse bitesize 2014 more radioactive dating retrieved from httpwwwbbccoukschools.
Dating rocks rocks can be dated in a similar way by measuring the proportion of radioactive uranium in some cases or potassium in others these isotopes have much longer halflives than carbon14 so are suitable for investigating ancient rocks.
In this model eliciting activity mea students must use their knowledge of radioactive dating and geologic time to select an effective elemental isotope to be used.