Dinosaurs

Tennessee has a state fossil - the bivalve mollusc, Pterotrigonia thoracica. It is from the Late Cretaceous.

Five types of dinosaurs are sauropods, carnosaurs, therapods, ceratopsians and hadrosaurs

the differenses between triassic period and the jurassic period is that idk i will have to think about it.

Mammals and dinosaurs started about the same time and mammals are still here, so ... Mammals! (Unless you count birds as dinosaurs, in which case it's a tie). One of the mysteries of evolution is why the dinosaurs came to dominate the mammals in the first place.

The Brachiosaurus Altithorax refers to a group of dinosaurs that lived in the Jurassic period. They are more commonly referred to as a brachiosaurus.

According to EnchantedLearning.com, dinosaur fossils have been found for at least hundreds of years. The first one to be described scientifically, however, was the Megalosaurus in 1824.

See the "related link" below.

In some rare cases the skin or an impression of it is preserved in a fossil. Originally scientists mostly just assumed they had scales. Recently the impressions indicate that some species such as raptors (even the T-Rex) had feathers, probably for mating displays. Others, such as triceratops had bristles indicating that hairy dinosaurs were a possible classification. Both the feathers and hair may have been used for insulation and temperature control.

Glyptodons eat grass

No. The first mammals appeared shortly after the first dinosaurs.

Well, first you start by making sense when you ask the question. After that, you look in a book and realize "tyrannosaur" has been extinct for about 65,000,000 years, and you won't be "getting" it anytime soon.

I'n not quite sure, but I know it has something to do with the bones. I'm sure an archaeoligist would know.

We might suppose that dinosaurs were happy when they had plenty of food, weren't being chased or stalked by predators, had successfully mated, saw their eggs hatch, weren't too hot or too cold and weren't suffering from any wounds or aches.

However, we don't really know if dinosaurs had the part of the brain that causes what we call "happiness," the limbic system. They may have been limited to what is known as the "R complex" (R is for "reptile." although fish also have this part) which just tells them to do simple things such as "run away," "bite that" or "get under the shade."

Then again, some dinosaurs had brains as big (for their size) as birds and birds certainly SEEM as though they can be happy, so who knows?

Carnivores have sharp teeth, which are used to rip apart meat. herbivores have flatter teeth which help them grind up plants.

Scientists also compare the physical attributes of living carnivores (sharp teeth, claws, etc.) with those of the dinosaurs to see if they are set up to be successful carnivores. There is also work done on the relative populations of the supposed carnivores to the data for supposed herbivores. Predators (carnivores) usually have a significantly lower population number than prey animals.

Additionally, some dinosaurs such as coelophysis and microraptor have been found with the bones of other animals in their stomachs.

A dinosaur with winds and a beak is called a bird.

Sometimes pterosaurs are said to be this, but this is in correct as pterosaurs were not dinosaurs.

The largest species of bone headed dinosaur, or Pachycephalosaur, was Pachycephalosaurus, measuring 15 feet long and weighing 990 lb. The smallest was Dracorex, at about 10 feet in length.

Approximately 700 Species have been named. Alligators and Crocodiles ARE NOT dinosaurs! However, Birds are largely considered to be the ancestors of saurischian dinosaurs and therefore could be said to be dinosaurs.

During the Cretaceous period, which lasted from about 145 to 66 million years ago, vegetation was diverse and abundant, characterized by the dominance of flowering plants (angiosperms) alongside ferns, cycads, and conifers. The warm climate and high carbon dioxide levels supported lush forests and widespread plant life, contributing to rich ecosystems. This period also saw the evolution of various plant forms, including the emergence of modern trees and shrubs. Overall, the Cretaceous landscape was vibrant and varied, supporting a wide range of herbivorous dinosaurs and other wildlife.

Stegosaurus probably lived throughout most of the contiguous United States. Their fossils, however, have only been found in Colorado, Utah, and Wyoming.

because they had skin pigmentation differences and they all turned out different

I believe it's Alberta because some dinosaurs have been named after places there like the Albertosaurus

Towards the middle of the Cretaceous Period, dinosaurs had occupied every single continent, including the Antarctic and the poles. Finding an animal as large as a dinosaur at the south pole wouldn't be that big of a surprise, considering that the Earth was much warmer back then and that ice only came at the poles only for a few months every year. If the dinosaurs could migrate or hibernate, they could have lived anywhere on the globe.

Ammonites went extinct at the end of the Cretaceous Period.

They were called gastroliths.

Earth is 4.55 billion years old. If you don't count birds, Dinosaurs were around for 166 million years or about 3.6% of Earth's history. If you count birds as dinosaurs, which most scientists now do, dinosaurs have been around for 231 million years or about 5% of Earth's history.

T-Rex is the short form on Tyrannosaurus. The first T-Rex appeared on earth during the early Cretaceous about 137 million years ago. "T-Rex" means the king of the dinosaurs. They were carnivorous and mainly eat smaller dinosaurs.