https://padlet.com/gfbees12/rocksandfossils An Earth Science Padlet by Grant Finch en-us 2016-07-16 22:58:23 UTC 2023-05-18 03:17:20 UTC hello@padlet.com gfbees12 https://padlet.com/gfbees12/rocksandfossils/wish/116501221 Fossils are found in sedimentary rocks that formed when eroded sediments piled up in low-lying places. Sedimentary rock is layered, with the layers derived from different periods of sediment accumulation. The bottommost layers are older than the top layers. In this way geologists figure out the age using Relative Dating. ]]> 2016-07-16 23:04:25 UTC https://padlet.com/gfbees12/rocksandfossils/wish/116501221 gfbees12 https://padlet.com/gfbees12/rocksandfossils/wish/116501307 Nuclear decay of radioactive elements takes place at a predictable rate. Because of this, scientists can chemically analyze rocks and fossils to determine the ages, in years, of those rocks.]]> 2016-07-16 23:09:24 UTC https://padlet.com/gfbees12/rocksandfossils/wish/116501307 gfbees12 https://padlet.com/gfbees12/rocksandfossils/wish/116501396 2016-07-16 23:14:04 UTC https://padlet.com/gfbees12/rocksandfossils/wish/116501396 gfbees12 https://padlet.com/gfbees12/rocksandfossils/wish/116501419 2016-07-16 23:15:29 UTC https://padlet.com/gfbees12/rocksandfossils/wish/116501419 gfbees12 https://padlet.com/gfbees12/rocksandfossils/wish/116501436 http://naturalhistory.si.edu/exhibits/backyard-dinosaurs/questions-answers.cfm?know=a24 ]]> 2016-07-16 23:17:03 UTC https://padlet.com/gfbees12/rocksandfossils/wish/116501436