Geol 112 Module 8 Quiz

Geol 112 Module 8 Quiz - the age of Earth Relative Dating...

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Module 8 Quiz 1. What is an isotope ? An isotope is the different forms of an element, with each one having a different atomic mass. Isotopes of an element have the same number of protons but differ in the number of neutrons. 2. Which dating technique is used to date samples younger than 50,000 years? The carbon 14 method is used to date samples anywhere from 100 years to 75,000 years old. How does radiometric dating differ from relative dating ? Radiometric dating is used to date items by comparing the amount radioactive isotopes and their decaying rates. It helps provide information for the absolute age of rocks and other things like
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Unformatted text preview: the age of Earth. Relative Dating is just an estimate of the order of geological and prehistoric events by observing fossils and the way they are situated in the ground and by stratigraphic rules. 4. How old is the earth and what is the age based on? The age of Earth is estimated to be about 4.5 billion years old. This age was determined by using the radiometric age dating technique. What is a half life? The half life of an element is the time it takes for the item to decay to half of its initial amount....
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