What were the dinosaurs




What were the dinosaurs


The following texts are the property of their respective authors and we thank them for giving us the opportunity to share for free to students, teachers and users of the Web their texts will used only for illustrative educational and scientific purposes only.


All the information in our site are given for nonprofit educational purposes

The information of medicine and health contained in the site are of a general nature and purpose which is purely informative and for this reason may not replace in any case, the council of a doctor or a qualified entity legally to the profession.



What were the dinosaurs


What were the dinosaurs?


Dinosaurs were a branch of Class Reptilia

Features of dinosaurs:

  • Laid shelled eggs (occasionally fossilised)
  • Some cared for their young (fossils found showing nests of eggs with adults close by, family groups)




  • May have been warm blooded
    • May have required a high metabolism to support size & level of activity
    • Blood flow through bones, bone growth patterns support warm-blood


  • Herbivores & carnivores
  • Only lived on land
    • Some related reptiles lived in water- ichthyosaurs
    • Some related reptiles flew/glided- pterosaurs



Dinosaurs evolved to fill almost all ecological niches- large, small, herbivores, carnivores.



Dinosaurs are classified into two groups: lizard-hipped & bird-hipped.


The Saurischia (lizard-hipped) dinosaurs have the three main bones of the hip girdle arranged with the pubis (front bone) pointing forward (like reptiles).

  • Theropods- predatory dinosaurs
  • Sauropodomorphs- very large, long-necked, herbivorous dinosaurs



The Ornithischia (bird-hipped) dinosaurs have the hips similar to that of modern, but not fossil, birds. All of the ornithischians were herbivores.

Examples: stegosaurus, anklyosaurus, triceratops, bipedal dinosaurs like iguanadon





66 million years ago, all dinosaurs became extinct except for a group of theropods which had evolved into birds.


The real reason for dinosaur extinction…

Current evidence is that a meteorite caused volcanic activity and climate change (KT event). The earth was hotter and drier, and large organisms didn’t have enough food to survive.


Source : https://kcdl.wikispaces.com/file/view/Dinosaurs.doc

Web site link: https://kcdl.wikispaces.com

Google key word : What were the dinosaurs file type : doc

Author : not indicated on the source document of the above text

If you are the author of the text above and you not agree to share your knowledge for teaching, research, scholarship (for fair use as indicated in the United States copyrigh low) please send us an e-mail and we will remove your text quickly.


What were the dinosaurs


If you want to quickly find the pages about a particular topic as What were the dinosaurs use the following search engine:



What were the dinosaurs


Please visit our home page


Larapedia.com Terms of service and privacy page




What were the dinosaurs