Story Board about geological time scale
Storyboard Text
- Hi guys today our topic is Geological Time Scale!!!
- Really?! What is geological Time Scale?
- Do you know the definition of Geologic Time Scale?
- Sure! Geologic Time Scale is a system of chronological measurement that relates stratigraphy to time.
- Hi! I don't know the definitionof it can you explain it to me?
- Ohhhh... that sounds interesting!
- Do you want to know the each meaning of it?
- Geological Time Scale is divided into four level hierarchy of time intervals.
- It's Eon, Era , Epoch, and Period!
- Ohhh!! that's easy to memorize! Eon, Era, Epoch, and Period!
- Yup! I want to know!
- Really?! then what are the four level of hierarchy?
- Era, is a a major division of time that is a subdivision of an eon and is itself subdivided into periods.
- Eon, is a Long span of geologic time. In formal usage, eons are the longest portions of geologic time (eras are the second-longest)
- Epoch is a finer subdivision of time possible and Periods are frequently subdivided into Epochs
- Proterozoic eon- it is when the atmosphere began to have oxygen, eukaryotes diversified, continents began to drift away.
- Archaean eon- the atmosphere that contained methane, with little to no oxygen, oceans were green due to lack of iron and stromatolite -field shoreline
- Mesozoic era- breakup of major landmasses, the largest creatures existed called dinosaurs.
- Hadeon eon came from the word "hades" which means hell and considered as a chaotic eon mainly due to meteorites that constantly bombarded to earth
- Paleozoic era- reptiles started to appear
- Cenezoic era- mountains were uplifted, humans left their marks on land as observed on the stone tools that were used.
- Devonian Period- animals began to breathe air as amphibians came out of the sea
- I know something about Geologic Time Scale too!
- oh really?! Share it!
- Wow! that's a lot of knowledge! I'm very impressed!
- It's time to end our chat! Did you guys learn something?
- Thank you for sharing your knowledge about Geological Time Scale! I learned a lot! I am excited to share it with my friends!
- No problem! Thank you for sharing your knowledge as well!
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