<p> http://nemo.sciencecourseware.org/VirtualDating/ Extra Credit (7 points) Due Friday April 27. Click on link for: Virtual Dating Isochron for rocks and minerals and do the following exercises- then print out the certificate at the end. If you get stuck- print out the page you get stuck on for partial credit.</p><p>Isochron Age in MILLION of Geologic Event 0.002Slope years140 Dinosaurs roamed the earth 0.0077 540 First evidence of abundant fossils 0.0362 2500 Proterozoic Era begins 0.0582 3980 Oldest radiometrically dated Earth rock 0.0668 4550 Earth's age, inferred from meteorites Nole for the page on “Isochron Diagrams” (Page 14 of 17)- this page has some out of date information- use the number below to proceed. </p><p> http://nemo.sciencecourseware.org/VirtualDating/ Extra Credit (7 points) Due Friday April 27. Click on link for: Virtual Dating Isochron for rocks and minerals and do the following exercises- then print out the certificate at the end. If you get stuck- print out the page you get stuck on for partial credit.</p><p>Isochron Age in MILLION of Geologic Event 0.002Slope years140 Dinosaurs roamed the earth 0.0077 540 First evidence of abundant fossils 0.0362 2500 Proterozoic Era begins 0.0582 3980 Oldest radiometrically dated Earth rock 0.0668 4550 Earth's age, inferred from meteorites Nole for the page on “Isochron Diagrams” (Page 14 of 17)- this page has some out of date information- use the number below to proceed. </p>