Relative and Absolute Age Determination Lab Assignment (40 marks) Part 1- Absolute Dating Below are several problems based on radioactive decay. Use the hait-life of the necessary isotope to complete the questions. Half-lives Carbonwelitrogen14 --5730 yrs Uranlumzasheadzar- 713 million yrs Potassiumad/Argonu- 1.3 billion yrs 1. A fossilized bone was found in a deep layer of rock. Analysis of the bone showed 12.5% of the total Carbonis was left. Based on the amount of Carbonis left in the bone, how old is the bone? (1 mark) 2. In the diagram below, there are 4 sedimentary units. The igneous intrusion (V) was dated. This rock had 25% of the overall Uranium23s left in the composition of the rock. ( 2 marks) a) Using the amount of Uraniumzss left in the intrusion, how old is the intrusion? b) What are the relative ages of the rock layers around and beneath the intrusion?.