dust injected into the stratosphere from the impact absorbed visible light from the Sun, causing global temperatures to plummet.
Many of them are, yes. However, some asteroids are composed largely of iron.
The Mesozoic era, spanning from approximately 252 to 66 million years ago, is not considered the golden age of mammals; rather, it is known as the age of reptiles, particularly dinosaurs. During this time, mammals existed but were small and largely overshadowed by the dominant dinosaurs. The true golden age of mammals occurred in the Cenozoic era, following the mass extinction event that wiped out the dinosaurs, allowing mammals to diversify and occupy various ecological niches.
Cattle have largely replaced buffalo on the prairies for commercial meat production. This change occurred due to the near-extinction of buffalo in the 19th century and the subsequent expansion of cattle ranching in the region.
Tell them that just because something is natural, sdoesn't mean it's good! (Poisen Ivy anyone?) they are right and wrong.many species have gone simply because of the stupidity of humans,not by natural process.
Comets are largely made of ice and the ice and rocky materials they are made of are more loosely packed than an asteroid which is typically more solid chunks of rock and metal.
Because most animals now were just cells at the time, or water animals and have eventually evolved into what we have today. They were also reptilians i.e coldblooded, and needed the sun for warmth and energy. Hence the asteroid struck and no sun for hundreds of years due to all the dust in the atmosphere. no more dinosaurs. +++ The survivors were animals that could cope with the world-wide climate-change that killed off most of the dinosaurs. These were largely fish, insects, mammals, enough reptiles to keep the family going, and early forms of the birds. The birds evolved from certain dinosaur lines. There is a theory that the asteroid impact's effects were augmented by those of contemporary, very large-scale volcanism, particularly that which formed the Deccan Trappes along the W coast of India.
Many of them are, yes. However, some asteroids are composed largely of iron.
Mass extinctions may occur due to a combination of factors, including climate change, asteroid impacts, volcanic eruptions, and human activities such as deforestation and pollution. The current rate of species extinction is largely attributed to human actions leading to habitat destruction and climate change. Without significant changes in how we interact with the environment, the risk of a mass extinction event happening is a real concern.
The extinction rates of terrestrial and freshwater organisms varies per location. This is largely dependent on other growing and declining populations.
The Mesozoic era, spanning from approximately 252 to 66 million years ago, is not considered the golden age of mammals; rather, it is known as the age of reptiles, particularly dinosaurs. During this time, mammals existed but were small and largely overshadowed by the dominant dinosaurs. The true golden age of mammals occurred in the Cenozoic era, following the mass extinction event that wiped out the dinosaurs, allowing mammals to diversify and occupy various ecological niches.
No, the last of the dinosaurs died out in a great extinction about 65 million years ago.Our very earliest hominid ancestors only existed around 7 million years ago, and our own species, Homo sapiens, has only existed for a little over two hundred thousand years.It is not possible for dinosaurs and humans to have come into contact.AnswerYes. Those who believe that the Earth is 6,000 to 10,000 years old may also believe that dinosaurs and humans co-existed. Believers say that dinosaurs and humans co-existed After the flood of Noah, and that man himself has largely been responsible for the extinction of those Dinosaurs that were on the ark and lived on earth in the centuries afterwards. For example, over 200 alleged sightings exist in England alone where contact between humans and creatures we would call dinosaurs occurred in times past. Many American Indian tribes have accounts of direct dealings with various creatures we would call dinosaurs and describe their habits and haunts.Interestingly many of the above recorded observations, while not scientific descriptions as such, do contain detail sufficient to narrow down the likely species or group of species to a few.
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.
because it is our calture
Some dinosaurs are beleived to have lived in herds, probably led by an Alpha leader as most modern herd animal herds are. Some predators may have hunted in packs like wolves and may have had alphas as well. Other dinosaurs wer probably solitary. This is largely speculatory as there is little remaining evidence of dinosaur behaviour ecxept form what we can deduce from their fossil remains.
largely successful because they built close ties with Native Americans.
(beliefs)
1.) mammals,amphibians,crocodiles,turtles,insects,and land plants survived the cretaceous time. 2.) 1815 was called the year without summer because the volcanic dust, propelled into the stratosphere where it couldn't get rain, sunlight. 3.) Not only was iridium common in the last Cretaceous layers, but also microtektites, which are small glass spheres characteristic of the impact of an asteroid with terrestrial rocks that contain silicon. Shocked quartz grains, characteristic of powerful impacts, were also found. 4.) All this happened, even though the global temperature decreased by only about 2°F (1½12;°C). 5.) The Cretaceous extinction changed the face of biodiversity on Earth. After the large dinosaurs were gone, many large mammals evolved as well as many small ones. 6.) The lower part of the Cretaceous System consists of six stages: the Berriasian, Valanginian, Hauterivian, Barremian, Aptian, and Albian. 7.) Early Cretaceous characteristically deltaic and lacustrine. 8.) Late Cretaceous including marine deposits, such as sandstone and the characteristic chalk, a pure fine-grained white limestone formed largely of planktonic coccoliths. 9.) As continents continued to drift apart, the climate over much of the land became cooler and drier during the Cretaceous. 10.) plants appeared, and dinosaurs and other reptiles reached their peak of development.