Who has information and slides about dinosaurs?

Dinosaurs were a group of animals that lived between 235 million and 65 million years ago and were able to walk upright with hind limbs supporting their bodies, and dominated the world's terrestrial ecosystems for more than 160 million years. Most of the dinosaurs have gone extinct, but the descendants of the dinosaurs, the birds, have survived and survived to this day. In colloquial language, dinosaur refers to ugly women.

The word "dinosaur" has two meanings in the dictionary: a group of ancient animals that lived hundreds of millions of years ago and are now extinct; Contemporary women who are not good-looking.

Here are some dinosaur profiles:

Tyrannosaurus rex is a very ferocious animal, it is huge, but the agility is abnormal Tyrannosaurus rex, also known as Tyrannosaurus rex, the only effective species is the Rex Tyrannosaurus Rex, or Rexsaurus, is a large carnivorous dinosaur, about 13 meters long, weighing about 7 metric tons, living in the last 3 million years of the Maastric Ladder at the end of the Cretaceous Period, about 68.5 million to 65.5 million years ago, It was one of the last dinosaur populations before the Cretaceous-Tertiary extinction event. The fossils are found in the United States and western Canada in North America, and are more widely distributed than other Tyrannosauridae.

Chinese scientific name: Tyrannosaurus.

Latin name: Tyrannosaurus

Nicknames: Tyrannosaurus rex.

Kingdom: Animalia.

Phylum: Chordata of the phylum Chordata

Class: sauropsida

Order: saurischia

Suborder: Theropoda

Family: Tyrannosauridae genus: Tyrannosaurus

Species: Rex Tyrannosaurus t rex

Distribution: The United States and western Canada in North America.

Conservation status: Fossils.

Mamenxisaurus is the largest sauropod dinosaur ever discovered in China, named after the type species found in Mamenxi, Yibin, Sichuan, China. The total length of this animal is 22 meters, and the body height is nearly 4 meters. Its neck is particularly long, equivalent to half the length of its body, and not only makes up each cervical vertebrae long, but also has as many as 19 cervical vertebrae, which is the largest among sauropods.

In addition, the neck rib is also the longest of all dinosaurs (the longest neck rib can reach meters). Compared with the cervical vertebrae, the dorsal vertebrae (12), the dorsal vertebrae (4) and the caudal vertebrae (35) were relatively few.

Chinese scientific name: Mamen Xilong.

Latin scientific name: mamenchisaurus

Kingdom: Animalia.

Phylum: Chordates.

Class: Sauromorphs.

Order: Lizard-hips.

Suborder: Sauropod suborder.

Family: Diplodocidae.

Genus: Mamenxi Dragon.

Body length: 16-30 meters.

Weight: 20-30 tons.

1. Dinosaurs are a general term for a class of reptiles that appeared in the Mesozoic era. It has athletic limbs, a long tail, and a large body. They mainly inhabit woodlands or open areas on lakeshore plains.

2. There are many species of dinosaurs, and there are large differences in body shape and habits, among which the largest fragile double-chambered dragon may be more than 50 meters, while the smallest hummingbird may be less than 10 centimeters. In terms of eating habits, there are docile herbivores and ferocious meat eaters, as well as omnivorous dinosaurs that eat both meat and vegetables.

3. In the Mesozoic era where dinosaurs lived, the content of carbon dioxide in the atmosphere was higher, indicating that dinosaurs were very adaptable. At that time, mammals had also appeared, but they were always in a weak position during the Mesozoic Era, and their development was slow.

4. With the passage of time, by the end of the Cretaceous period, the atmospheric environment changed dramatically, the content of carbon dioxide decreased, and the content of oxygen increased, which was not good for the dinosaurs. In a new environment, it is easy to get sick, and the disease spreads like a plague.

5. The new atmospheric environment is more suitable for the survival of mammals, and mammals have become more advanced and adaptable competitors. Under the influence of these two factors, the dinosaurs eventually became extinct.