Absolute age dating

Question or Hint Answer or Word
  1. Half-life The time it takes for a radioactive isotope to decay to one-half of its original amount.
  2. Raidiocarbon dating Determining the age of organic mateials, which contain a lot of carbon.
  3. Varves Bands of alternating light and dark coloured sedimends of sand, clay and silt. can be over 120,000 years.
  4. Radioactive decay The emission of radioactive particals changing one isotope into another isotope over time
  5. Radiometric dating when scientists use radioactive isotopes to date an object.

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