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AutoSave arr OFF ^.CO. Home Insert Draw Design Layout References Mailings Review A A Aa Paste Page 1 of 2 Times New.... v ✓ 10 B I Uvju 3x₂ 428 words DE V x₂x² ADA 呕 English (United States) درش E~E~E~ == Radiometric Dating LAB Updated done The purpose of this lab is Radiometric Dating or absolute dating where the actual age of the rocks will be determined. View Tell me T 1. Go to the following website http://profharwood.x10host.com/GEOL101/ ... /index.htm 2rd. Follow the directions on the website Half-Lives Elapsed 3rd: When possible, check all your answers by clicking on appropriate tahs for grading. Additional questions have been added not on the website. 0 1 2 3 40: Place your responses on this sheet and then upload your lab into the Radiometric Dating LAB drop box. Helpful Hint (first table): Although you are to follow the directions on the website, you may find the following helpful. At zero half-lives 100% of the Parent Isotope exists and 0% daughter product has formed. This represents no lapse of time for the unstable parent isotope. At each half-life, half of the parent isotope turns into the daughter product. Matter can't he created or destroyed. The parent material turns into the daughter product. For this first table do not round your answers. All your daughter/parent ratios should be whole numbers, no decimals. On the website only the third column is checked for you, all three columns of the table will be checked as part of your overall lab score. + 4 5 6 AalbCcDdle AaubCcDdte AaBb AaBbcDdEr AaBb, Normal No Spacing Heading Hascing 2 1. Parent Isotope 0 0.5 0.25 0.125 0.0625 0.03125 0.015625 2. Daughter Daughter/Parent Isotope Ratio 0 0.5 0.75 0.825 0.9375 0.96875 31 0 1 3 7 15 Helpful Hint (second table): The half-life of C-14 (Carbon 14) is 5,730 years. Once you have determined the number of half-lives that have clapsed multiple the number of half-lives by 5,730 years to determine the age in years for the table below. Follow the directions on the website and check your answers before you place them into the table below. Title Focus 3 F Styles Pane Dictate Share Sensitivity Comments Editor + 135%
OFF ^.CO. Home Insert Draw Design Layout References Mailings Review A A Aa As E-EE ADA AutoSave arr Paste Page 1 of 2 Times New.... v ✓ 10 B I Uvju 3x₂ 428 words DE V x₂x² 呕 English (United States) === Sample 1 2 3 4 View Tell me ET Radiometric Dating LAB Updated done NP Helpfid Hint (second table): The half-life of C-14 (Carbon 14) is 5,730 years. Once you have determined the number of half-lives that have elapsed multiple the number of half-lives by 5,730 years to determine the age in years for the table below. Follow the directions on the website and check your answers before you place them into the table below. 736 918 528 248 ND AalbCcDdle 1472 6426 12144 2232 Normal AaBbccpdt: AaBb AnBECEDIE AaBbt, Ne Sparing Heading Hasting 2 Title ND/NP 2.0 7.11 23.00 Half-lives Elapsed 17 3.0 4.5 1250000000 Million years Age in Years 17 30 45 Bonus (third table) 5 points: No bonus will be given for filling in the half-life of Potassium-40 only. Five bonus points will be awarded for having all ten of the following blanks being filled in correctly. Partial bonus will not he awarded. What is the half-life of "K? (Round the answer to the nearest million years: Focus 3 F Styles Pane Dictate Share Sensitivity Comments Editor + 135%
Radiometric Dating - Graphical Method The purpose of this portion of this exercise is to practice determining radiometric ages using graphical techniques and mathematical techniques. Consult your lab manual and materials for details. Complete columns 1 and 2 in the table below. For example, after one half-life 0.5 of the original parent isotope remains, 0.5 of the sample is now the daughter isotope. After two half-lives 0.25 of the original parent isotope remains, 0.75 of the sample is now the daughter isotope. Complete column 3. Divide the value in column 2 by the value in column 1. Enter the appropriate value in the space provided. Once all values have been entered, check you answers by clicking on Grade Daughter/Parent Ratio. (Note: Only column 3 will be graded) Half-Lives Elapsed 1. Parent Isotope 2. Daughter Isotope 3. Daughter/Parent Ratio 0 1 2 EARTH SCIENCE LAB Radiometric Dating 3 40 4 5 0.5 0.25 Grade Daughter/Parent Ratio For samples 1, 2 and 3 determine the No/N ratio in the table below (calculate and enter each value to 2 decimal places- 3.454 is entered as 3.45; 12 is entered as 12.00: I values less than 1 must have a "0" in front of the decimal - 0.35, 0.50, etc.). Np is the number of parent atoms. No is the number of daughter atoms. 0.5 0.75 Using the graph, determine the number of half-lives elapsed for each sample. (estimate each value to 1 decimal place - 1.5, 6.3, etc.) If the half-life is 5,730 years, determine the age of the sample. (enter all values without commas- example 5,678 would be entered as 5678; calculate all values to the nearest whole number) Sample Np N₂ 1 736 1472 918 6426 528 12144 2 3 1 No/Np Half-lives Elapsed Age in Years Grade Daughter/Parent Ratio Grade Half-Lives Flapsed Grade Age in Years