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Transcript of Dinosaurs
The dinosaurs were a group of reptiles that lived from 225 MYA (million years ago) to 65 MYA. We call this the Mesozoic era. It was split into three periods: the Triassic, Jurassic and Cretaceous periods
The Triassic period
The Triassic period was the first period of the mesozoic era, from 250 MYA (the dinosaurs only appeared late in the Triassic period) to 200 MYA. Being the period when dinosaurs first appeared, they weren't dominant. The main predator was
, a small and agile predator who lived off small mammals and dead bigger animals.
The Jurassic Period
The Cretaceous period
The cretaceous period was the last period of the dinosaurs, from 100 MYA to 65 MYA . The main reason of there sudden ending was a 10-kilometre meteorite smashing into the gulf of Mexico. The period is well known because of
, a 13-and-a-half-metre-long piece of bulk and 50CM long teeth
The Jurassic period was the second period in the mesozoic era, between 200MYA and 100 MYA. The Jurassic was famous for sauropods such as
. The period's main predator was Allosaurus, a 12-metre long therapod who terrorized anything it came across.
The different types
How it all ended
How did the dinosaurs die out? well, most scientists think that 65 MYA a 10-kilometre wide meteorite hit a shallow sea called the gulf of Mexico, and left a 200-kilometre crater in a desert. This almost immediately killed everything in the area, but it took about a thousand years for every dinosaur to die.
To see it happen (it's not the real video!) watch this video.