In radiometric dating, the known ______ of an isotope and the amount of isotope left in a fossil can be used to estimate when the fossil formed.Multiple choice question.natural sourcefree energyradiushalf-life

Carbon-14 dating, a type of radiometric dating, uses ______ as a type of clock to measure the age of fossils.Multiple choice question.isotopesprotonselectronshydrogen atoms

The age of a fossil can be determined usingGroup of answer choicesradiometric datingNonespeedometricpediometric

In the process of radiometric dating, if the percent of the original amount of carbon-14 present in a fossil is 12.5%, how old is the fossil? The half-life of carbon-14 is 5,730 years.Multiple choice question.11,460 years old17,190 years old5,700 years old22,920 years old

What elements’ isotopes are used to estimate how old something is? Why do scientists use morethan one type? (Be specific, it is not just to get repeated results)3. Pretend you are a scientist and have a tool like the one on Dating Game tab:a. How do you decide which to use: Carbon-14 or Uranium-238?b. How does the percentage help you estimate the age?c. If you can’t get a reading on one object like the fish fossil , what else canyou try? Determine the approximate age of the fish fossil and explain what you did toestimate the fossil age.4. If you were a forensic scientist and found a dead buried body, could you use one of the isotopesin the simulation to figure out how long ago the person died? Explain.5. What type of reaction do Carbon -14 and Uranium- 238 undergo? Explain how you figured thisout and write the reaction for each.

Two types of dating methods are used to establish the age of a rock or fossil. What is thedifference between relative dating and radioactive dating? __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________