Hi there I'm having trouble with this study guide. Could someone please help me?
You’ve returned from a recent geologic expedition and discovered that the security at the airport has dumped out all of your carefully sorted rock samples into a heap. You need to quickly sort the rocks by age. The first rock, sample A, has fossilized footprints from some kind of a mammal. Sample B contains shark teeth and shells. Sample C has a perfectly preserved specimen of Phacops rana and sample D has half of Chonetes. How do you rank your samples from oldest to youngest?
ii. What are the absolute ages of your samples?
iii. Did amphibians evolve into dinosaurs?
iv. From all of the choices listed in this lab, which animal has been around for the longest amount of time? Which has been around for the shortest amount of time?
5. You have a sample of rock that contains 91.7% Uranium 235 and 8.3% Lead 207. How old is this rock?
6. You have a document that has 1.1 Nitrogen-14 content, how old is it?
7. Why isn’t it a good idea to use Carbon-14 dating to date rocks?
1 answer