https://padlet.com/kian_breslin/n5hkok7y6xq1enz6 Biology Assignment en-us 2021-03-29 17:04:43 UTC 2026-03-16 21:20:32 UTC hello@padlet.com kian_breslin https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364972420 The study of fossils and prehistoric life. An example would be the study of dinosaurs.]]> 2021-03-29 17:06:22 UTC https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364972420 kian_breslin https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364974794 Fossils are remnants of organisms that existed in the past. There are many different types of fossils and many different ways fossils can be made. Permineralization occurs when minerals replace the remains of an animal over time. Casts occur when an animals imprint is left in the ground Trace fossils are fossils which show signs of animal activity such as footprints. Amber fossils occur when organisms are trapped in resin that hardens over time. Preserved remains occur when an entire organism is trapped in a material such as ice or ash or is preserved in a bog.]]> 2021-03-29 17:06:55 UTC https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364974794 kian_breslin https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364975138 Transitional fossils are fossils which serve as an intermediate between two species. An example is a fossil of a Basilosaurus, which is a species with a whale-like body, but has limbs of land mammals.]]> 2021-03-29 17:06:58 UTC https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364975138 kian_breslin https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364976934 Fossils which existed during specific spans of time over large areas. Index fossils can be used to date layers of rock. An example of an index fossil are trilobite fossils, which exited about 250-500 million years ago.]]> 2021-03-29 17:07:21 UTC https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364976934 kian_breslin https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364977246 Relative dating is a way to roughly estimate the age of a fossil by comparing it to the placement of fossils in other layers of rock. Radiometric fossil dating is a way to precisely measure the age of a fossil by looking at the amount of the unstable isotopes carbon-14 and nitrogen-14 inside the fossil.]]> 2021-03-29 17:07:26 UTC https://padlet.com/kian_breslin/n5hkok7y6xq1enz6/wish/1364977246