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Zachs study guide!!!

Finals study guide

QuestionAnswer
What do scientists use index fossils for? They are used to date rock layers
What is an example of a trace fosill? A foot print left behind while the dinosaur was traveling
What is an example of a catastrofe event? A meteor striking Earth
What mineral has the hardest density? A diamond
In which era did the dinosaurs rule earth? The Mezisoic era
What do scientists use to date rock layers inside the Earths crust? The geologic column
What do we call the time it takes a radioactive isotope to become stable? The isotopes Half-life
What is Radioactive decay? The process in which radioactive isotopes break down into either another element or into a stable isotope of the same element
What is a daughter isotope? It is a stable isotope
In which era did it end with the largest mass extinction known? The Paleozoic era
Created by: awsomezach123
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