We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byKeith Eggett
Modified over 2 years ago
III. Radioactive Dating A. Used to find ABSOLUTE age in years. B. Radioactive ISOTOPES in rocks DECAY away at a predictable rate.
III. Radioactive Dating 1. Carbon-14 – Used to date RECENT, ONCE LIVING things. Decays into Nitrogen-14
III. Radioactive Dating 2. Uranium-238 – Used to date very old rocks. Decays into Lead-206.
Half Life C. The amount of time it takes for HALF of the radioactive isotope to DECAY is called its HALF LIFE. 1. Half life DOES NOT CHANGE. (Thats why its on the ESRT!)
Radioactive isotopes decay from the Parent material into the Daughter Product. Original Parent Material Daughter Product
Each half-life, the amount of atoms gets cut in half.
Dont worry about the last atom. You start with so many trillions that you never really get there. (It will just decay and then theyre all gone.)
Since you dont know how many atoms you started with, a ratio between parent to daughter will tell you how many half-lives have gone by. 100% parent 0% daughter 0 half lives
One half-life. 50% parent 50% daughter 1 half-life
Two half-lives. 25% parent 75% daughter 2 half-lives
Three half-lives. 12.5% parent 87.5% daughter 3 half-lives
Four half-lives. 6.25% parent 93.75% daughter 4 half-lives
Radioactive Isotopes and Half Life 1. What is a Radioactive Isotope? What is Radioactive Decay? What is Half Life? (Take notes as we discuss) 2.
Absolute Age Finding a rocks birthday. Absolute Age? Give an example of an absolute age of a rock layer… That rock layer is 200 million years old. Remember,
How do we determine geologic age? 1.Uniformitarianism = the processes that shape Earth have not changed.
Radioactive Decay & C- 14 Dating Evolution Unit Chapter 14 p.382.
Background The half-life of a radioactive element is the time it takes for half of its atoms to decay into a stable isotope or element. Radiometric dating.
Section 1Nuclear Changes Section 1: What is Radioactivity? Preview Key Ideas Bellringer Nuclear Radiation Nuclear Decay Math Skills Radioactive Decay Rates.
Absolute Dating Chapter 3, Sec.3. Process to find the approximate age of rocks or fossils.
Fossils are usually formed when an organism is covered by sediments that then harden into sandstone, slate, mudstone or flint. Most organisms do not fossilize.
… it is highly important for us to gain some notion, however imperfect, of the lapse of years. Charles Darwin: On the Origin of Species 1859 Chapter 9:
The. of and a to in is you that it he for.
LESSON 10 – Earths History: Estimating Geologic Time Modified from
A. Direct Evidence B. Indirect Evidence. Visible evidence that takes us back in time and shows organisms have changed Ex. – Fossils.
CHAPTER 20 Nuclear Chemistry and Radioactivity 20.3 Rate of Radioactive Decay.
1 Section 8.2 Determining Absolute Age. Objectives Summarize the limitations of using the rates of erosion and deposition to determine the absolute age.
Geological Time - really, really, really long! Motion pictures are generally projected at 32 frames per second. Therefore, each frame (image) is on the.
Sections 14.3 and 14.4 Rate Laws and Concentration Changes over Time Bill Vining SUNY Oneonta.
IV. Isotopes 2 or more atoms of the same element having the same number of protons BUT different numbers of neutrons.
The Rock Record Chapter 8. Preview the chapter pages Look at headings Look at pictures Read the yellow highlighted words.
Geologic Time (History as told by Rocks). The Rock Record Geological Time Scale Dividing the Earth’s history into sections based on the fossils and.
SAMPLE EXERCISE 21.1 Predicting the Product of a Nuclear Reaction What product is formed when radium-226 undergoes alpha decay? Solution Analyze: We are.
Evidence For Evolution. We have defined evolution as change over time. Through his studies of Lamarck and his voyages around the world, Charles Darwin.
ConcepTest 30.1 The Nucleus There are 82 protons in a lead nucleus. Why doesnt the lead nucleus burst apart? 1) Coulomb repulsive force doesnt act inside.
Relative Time. Relative Dating Relative dating – events are placed in a sequence, but actual occurance dates are unknown. Who is older, Mr. Kopp or Justin.
Nuclear Chemistry Chapter 25. Radiation In 1896, Antoine Henri Becquerel discovered radiation by accident. His associates at the time were Marie and Pierre.
Dolch Words the of and to a in that is was.
1.Calculate the number of neutrons present in a carbon 14 nucleus. Radio-carbon dating is used to estimate the age of objects that were once living. All.
Debrief of Evidence for Evolution Take notes in your packet.
March 2012 By award winning Mr. Huppert. 1. What is a fossil? A fossil is the preserved remains or traces of living things Provides evidence of how life.
Unit 2 Notes – Radioactivity Part II Mr Nelson. Transuranium elements & Radioactivity Transuranium elements are just elements #93-11? (anything after.
© 2016 SlidePlayer.com Inc. All rights reserved.