Презентация к уроку английского языка "THE DINOSAURS"28.02.2018 568 98 Воропаева Татьяна Григорьевна
Student: Karina Musharapova
Teacher: Voropaeva T.G.
Millions of years ago, long before there were any people, there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era.
The dinosaurs dominated the Earth for over 165 million years, but mysteriously went extinct 65 million years ago. Paleontologists study their fossil remains to learn about the amazing prehistoric world of dinosaurs.
What are dinosaurs?
Dinosaurs were land-dwelling reptiles that walked with an erect stance. Their unique hip structure caused their legs to stick out from under their bodies, and not sprawl out from the side (like other reptiles ). When dinosaurs first evolved from more primitive archosaurs, they were bipedal (walked on two legs). Much later, some dinosaur groups returned to a four-legged stance, having hind legs much larger than their front legs
There were lots of different kinds of dinosaurs that lived at different times
• Some were HUGE, some were small. Some walked on two legs, some walked on four . Some were speedy , and some were slow and lumbering . Some were carnivores and some were herbivores . Some were armor-plated, some had thick, bumpy skin, some had horns , some even had primitive feathers.
• No one knows what colors or patterns they were, how they sounded, how they behaved, how they mated, or even how to tell whether a fossil came from a male or a female dinosaur.
Why dinosaurs became extinct?
• Dinosaurs suddenly became extinct about 65 million years ago, at the end of the Cretaceous period, which was a time of high volcanic and tectonic activity. There are a lot of theories why the extinction occurred. The most widely accepted theory is that an asteroid impact caused major climactic changes which the dinosaurs couldn't adapt to.
All that's left of the dinosaurs are fossils.
There are currently over 330 described dinosaur species and this number is growing. This, of course, is only a sample of all the different kinds of dinosaurs.
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