PPT-Radioactive Dating Nature’s Clock

When sedimentary rock is deposited in layers it is deposited horizontally Scientists use this Principle of Original Horizontality to help them determine the age of the layers The older layers of rock are found below the younger layers of rock. Fossils found in SEDIMENTARY ROCKS. The lower the sediment layer is, the older the fossils of the layer will be.- Law of Superposition. As time elapses, more and more sediment layers form to create the layers of sedimentary rocks.. Continuation of Journal Entry #5. Radiometric Dating. A technique used to date materials such as rocks based upon a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products using known rates of decay.. What is Radioactive Decay?. What is Radioactive Dating?. How do Scientists Determine Earth’s Age?. 93.75%. 6.25%. What is Radioactive Dating?. . DE 1:24 . 1. 3.9 billion years. 2. 22, 920 years. A. Hawkins. K. . Langhoff. J. . Shevlin. Jacksonville High School. As You Come In…. How old would you say this object is? Explain in a couple of sentences your reasoning for selecting the age that you did.. How old is the Earth?. Evolutionists say – about 4.5 billion years ago. Young Earth Creationists say – a few thousand years old. The Candle Analogy. Present-day observations are not a good basis for determining earth’s age.. Why are some elements (isotopes) more stable than others?. The Nucleus. The Electric Force. Protons hate Protons. Strong Force. Strong Force Facts. Neutrons act like cement. Strong Force is very strong over a small distance (about the distance of two protons). Fossils. Fossils provide a window into the past as they provide evidence about the changes that have occurred to the Earth over the 4.5 billion years of existence.. A . fossil . is the preserved evidence in rocs or soils of organisms that once existed on Earth.. And it’s relationship to the Genesis account of creation. (Genesis 5). Christadelphian. Beliefs. We believe the Scriptures are the inspired word of God. “All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness,” (2 Timothy 3:16 ESV). Nuclear Material. Half-Life. is the required for of a radioisotope’s nuclei to decay into its products.. For any radioisotope,. # of ½ lives. % Remaining. some atoms are unstable. …occasionally emitting particles. from nucleus to become more stable. (radioactivity). this changes the atom. into a different type of . atom (parent element. decays to daughter element). Relative Dating. To . determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones. This is called the Rule of Superposition.. Lecture 9. Absolute Dating of the Earth. Major Concepts. The discovery of radioactivity in the early 1900’s and the recognition that . radioactive decay . (a statistical event) occurs at a constant average rate for particular unstable isotopes has provided a means of determining the absolute ages of earth materials. Muhammad Al . Fredey. Abdullah . Alshaye. 1. Radiocarbon dating . Radiocarbon dating. (or simply . carbon dating. ) is a . radiometric dating. technique that uses the decay of . carbon-14. (. 14. C. Today’s Objective:. . How Do Scientist Figure Out A Numerical Age For Rocks? . Do Now. :. Using the diagram to the right what is the difference between relative dating and absolute dating? . What is a jiffy .