The Cretaceous Period was the most latest phase of the Mesozoic Era, finishing about 65 million years ago. Dinosaur - Dinosaurs were reptiles who lived on the Earth for approximately 170 million years, then became extinct. Extinction - The total disappearance of a species, frequently brought on by environmental conditions, is called extinction. Fossil - The preserved remains of an organism who lived long ago are known as fossils. Mesozoic Era - The period of the Earth's history from about 230 million to 65 million years ago is called the Mesozoic Era. Ornithischia - The Ornithischia were plant eating dinosaurs using hipbones who resemble the hipbone arrangement of modern birds.
Reptile - Reptiles are vertebrates who have dry scaly skin and - breathe by lungs, among other features. Saurischia - The Saurischia were dinosaurs using hipbones like those of modern crocodiles. The group comprised both plant- and meat eating dinosaurs. Therapod - The fiercest dinosaurs had been the therapods, two legged, flesh eating members of the Saurischia. From 230 million to 65 million decades ago, reptiles known as dinosaurs lived on the Earth. They varied tremendously in contour and size. Some were approximately the size of a dog, but others were huge, weighing several tons. Plants were eaten by the species, but others were flesh eaters.
Most were legged, but a lot of walked and - ran on their hind legs just. Dinosaur fossils have been discovered almost worldwide, and important new finds are continually reported. These fossils include bones, eggs, footprints, and - - - even traces of feathers. Based in their study of fossils, scientists have become able to classify dinosaurs in two main groups, the Saurischia and the Ornithischia. In addition using fossils as a guide, scientists have created life size models who show how different events in a dinosaur's life can have occurred. But a lot of mysteries remain. Among the biggest concerns the disappearance of the dinosaurs.
Scientists have suggested various theories to account for the extinction of those fascinating animals, but none have become conclusively proven.
Here are a few topics to explore who relate to dinosaurs. Looking at the articles, images, along with other materials in this Research Starter might give you more ideas. Each topic a lot more than one articles to start you in your research, while keep in mind that it can take one or more article to make a research paper. A treasure trove for teachers, parents, and - - - students. Very easy to navigate.
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