https://padlet.com/maggieschall27/7sd9pn8t2vh3 en-us 2018-07-12 13:19:17 UTC 2025-04-02 20:27:01 UTC hello@padlet.com maggieschall27 https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270056921 There are two main types of dating methods used for dating fossils and rocks, relative and radioactive dating]]> 2018-07-12 13:23:26 UTC https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270056921 maggieschall27 https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270057065 This method is commonly used when looking at sedimentary rock because you can link the type of sediments in the rock to different times and locations. The older layers of rock are found underneath the newer layers of rock, this is because as new rock forms, the older rocks get covered by the new sediments.]]> 2018-07-12 13:25:20 UTC https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270057065 maggieschall27 https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270057072 After discovering nuclear decay, scientists became able to figure out a more accurate age of the rocks rather than just "older" and "younger". Due to radioactive elements being present in many types of rocks and the element also having a half-life, we are able to get a better understanding of the exact age of the rocks. Scientists can use the half-life of an element to determine the relative age of a rock because after a certain amount of time half of the element will disappear. So if it takes the element 2,000 years to complete its half life and we find the rock with the trace-element in it 4,000 years after its formation, we will see only a certain amount of the element left getting a more accurate age of the rock and its formation.]]> 2018-07-12 13:25:26 UTC https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270057072 maggieschall27 https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270057116 https://naturalhistory.si.edu/exhibits/backyard-dinosaurs/questions-answers.cfm?know=a24
https://commons.wikimedia.org/wiki/File:Relative_dating_of_fossils.png
https://commons.wikimedia.org/wiki/File:OSC_Astro_07_03_Decay_(1).jpg]]> 2018-07-12 13:25:55 UTC https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270057116 maggieschall27 https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270058623 Scientists can use both methods of dating to get more accurate ages for when certain creatures and plants existed, when certain volcanoes erupted and other things that happened on earth.]]> 2018-07-12 13:43:07 UTC https://padlet.com/maggieschall27/7sd9pn8t2vh3/wish/270058623