Radiometric dating kids

04 Feb

Take for example the extinction of dinosaurs; no one really knows what happened so that is then scientific theory.

You might find them all disagreeing with each other as to what really happened. It will have the same shape as the original object, but is actually more like rock.

Once they know how old the rocks are, they will know how old the fossils are. Interesting Facts about Fossils • The largest single fossil ever found was a tree. Scientists think that when it was living it was over 100m long. So now you know how paleontologists find out how old fossils are and a few cool facts about fossils.

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But they landed up not liking each other too much and had a big fight, to see who could discover the most bones. Marsh and Cope also discovered this place, which is a rock formation just filled with Jurassic dinosaur bones.That’s pretty neat being able to find that information just from bamboo. These two men alone discovered enough dinosaur bones to keep those palaeontologists busy for a very long time!Even earlier than that there was a Greek philosopher, by the name of Xenophanes, found some fossilised sea shells in another really dry place. They would also spy on each other to win their own little competition. There is a place in North America called the Morrison Formation.Here we take a look at fossils and what they’re all about! Paleontologists definitely have a hard time figuring out how old fossils are, but they find ways and means to date them and see how old they really are. Fossils are normally buried in rocks, but the reason they the actual fossils are so difficult to understand the age of, is that they are buried in the wrong type of rocks to do tests on. They run special tests on the different layers of the rocks that are around the fossils to try and understand how old they are.Over time though, these radioactive pieces of rock fall apart and then change into different elements that aren’t radioactive. Who would have known that there were radioactive elements in rocks, wow?Now here’s a word to wrap your head around…if they use relative dating, this is actually called stratigraphy. If you had to cut open a piece of rock, you would see all sorts of layers running across. The oldest layers are right at the bottom, and the newest layers are at the top.So this is how it works – the oldest fossils are right at the bottom and the newest fossils are at the top. If paleontologists find the right layers of igneous rocks, then they can date the fossils quite accurately.It also helps them to find out about how things that were once living are related to stuff today and if they evolved or changed over time.They use special tools to study the fossils, to make sure that the fossils are safe and sound and don’t get damaged.They basically study fossils from millions of years back to find out all sorts of interesting things.They use fossils, which are often buried in rocks, to find out certain things, like where the fossils came from, what environment the fossil was in and also what those awesome fossils can tell us about the history of the Earth.