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name three species of the Jurassic period dinosaurs whose length was measured at 30 feet or longer
Lestat Rowe
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∙ 15y agoThe "Age of Dinosaurs" came to an end with the extinction event at the end of the Cretaceous.
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What has caused most of the mass extinctions on earth?
Mass extinctions are caused by rapid, global changes. Usually these are changes in climate. Without the right temperatures and precipitation, plants that animals depend on die out, which wipes out the animals. Examples include the Permian-Triassic Extinction, where volcanoes in what is now Siberia caused intense global warming, wiping out over 90% of species, and the K-T Extinction, where an asteroid impact suddenly blocked sunlight for months or years, killing off the dinosaurs and many other organisms.
Why do you get your period 2 weeks early?
theres not really a why its just the way your body operates. you won't get it the exact same time every month. Because sometimes your body calendar for your period is off a little bit. especially if you just started your period.
What does a peony look like in winter?
peoneys die back in the fall (stems die off) and develop new stems in the spring.
Did Chuckie from Rugrats die?
No. Naturally they would never have killed off any of the character from Rugrats.
How did dinosaurs get so big?
It really depends on what dinosuar. Dilophosaurus was a man-sized dino. They were actually about the size of a large dog. Although, the gigantic and famous Tyrannosaurus Rex and Brachiosaurus were huge mostlikely because it had to find food at different places. So, yes, genetics played a big role in the size of dinos and evolution of the needs. So the Brachiosaurus could reach leaves off of high trees. But, like I said before, not ALL dinosaurs were big.
What time period did raptors die off?
All the dinosaurs died off in the creatacious period ( by natural disasters) Including the raptor. ^_^
Were animals on Pangea?
Theoretically, Pangaea existed during the Jurassic Period. If you are familiar with the Michal Cricton novels, you are aware that during the Jurassic, the dinosaurs flourished. The Jurassic is the second element of the Mesozoic Period (Triassic, Jurassic, and Cretaceous). You should be aware that the dinosaurs are theorized to have died off at the end of the Cretaceous (look into KT Boundary Theory).
How did the coelophysis die off?
The better Q is "What was the cause of the triassic mass-Extinction?"
How did coelophysis die off?
The better Q is "What was the cause of the triassic mass-Extinction?"
Why did dinos die?
a meteorite hit the earth killing off the dinosaurs
What did the parasaurolophus evolve into?
Parasaurolophus died off at the end of the Cretaceous period along with all the other dinosaurs.
How many millions of years ago did dinosaurs become extinct?
The Cretaceous-Tertiary extinction event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs' food supply.
Did the Dinosaurs die together or at the end of their periods?
During the age of the dinosaurs, various species of dinosaurs died off and new ones came along but all non avian dinosaurs died 65.5 million years ago.
Dinosaurs became extinct at the beginning of the Cretaceous period?
No, dinosaus became extinct at the end of the Cretaceous Period. They ended up dying because the dust was so bad that it changed the weather, which changed the temperature and the way plants grow, which eventually killed off the dinosaurs.
What were some reasons people believe dinosaurs went extinct?
The dinosaurs first appeared on this earth around 230 million years ago and showed their existence for complete 160 million years.The dinosaurs existed in Triassic, Jurassic and Cretaceous period. The end of Triassic period witnessed mass extinction; about 95% species disappeared from this earth and with this went the early dinosaurs. The Jurassic period lasted for 30 million years where reptiles were the dominant figures and so this age is known as The age Of Dinosaurs. There are many theories as to how the dinosaurs became extinct but there is no absolute proven theory. Lets take a look at some. Large asteroid or comet collided with Earth about 65 million years ago. Scientists think that such a large collision would throw so much dust into the air that sunlight would not be able to shine and plants and animals would die. A huge increase in volcanic activity at around 65 millions years ago could have pumped so much ash into the air that it blocked out the sun killing the dinosaurs. Some scientists believe that there was a severe ice age. The last one ended about 10,000 years ago. A very severe ice age could have changed temperatures and frozen a lot of Earth's water. The dinosaurs would not be able live under such conditions and that is how the dinosaurs became extinct. It has also been suggested that desease killed off the dinosaurs. A very deadly and contagious desease may have circulated among the dinosaurs forcing them to become extinct. Another theory is that the Earth just gradually changed in climate over a long time period and the dinosaurs were not able to adapt to the cooler, dryer climate. There is now widespread evidence that a meteorite impact was at least the partial cause for this extinction. Impact craters are visible on most planets in our solar system.
Is postosuchus a dinosaur?
No, but it was very close. At the start of the Triassic, the infraclass Archosauromorpha started rapidly evolving to fill the niches left in the wake of the Permian Extinction. One group split into the crocodilians we all know and love, another became the dinosaurs. Postosuchus was a branch off of the first group, despite its similarities to the latter.
Can you give me 5 sentences of facts dinosaur?
1. Dinosaurs first appeared during the Triassic period (248 to 213 million years ago), and were the dominant land animals through the entire Jurassic period, and to the end of the Cretaceous period (65 million years ago). 2. We know about dinosaurs because fossils have been found. The fossils, which are generally found in sedimentary rocks, including fossilized body parts (bones, teeth, skin, claws, etc.), as well as trace fossils ("ichnofossils") which show how the animals lived, which include footprints, burrows, nests, toothmarks, dung, etc. 3. The earth's continents slowly move through a process known as "plate tectonics". When dinosaurs first appeared during the Triassic period, all the earth's continents were joined together in one super-continent known as "Pangea". 4. All the familiar types of dinosaurs, died off at the end of the Cretaceous period. There are many different theories why this may have happened, but today the most popular theory is that an asteroid hit the earth, blocking out the sunlight so that there was not enough food available. Evidence for this theory is a layer of iridium, which is believed to have come from the asteroid, has been found around the world, and a possible impact site found in southern Mexico. 5. The smallest known dinosaur is Compsognathus, which lived in Europe during the late Jurassic, and was about the size of a chicken. Compsognathus is believed to have eaten insects, lizards and other small animals.
