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Mass extinctions have only occurred since humans have been present on Earth?
Wiki User
∙ 14y ago
This would be an incorrect premise, the most obvious answer being that Dinosaurs ruled the earth long before humans came along. Dinosaurs are now extinct and that would have been more than a mass extinction, it was global extinction.
Wiki User
∙ 14y ago
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Why is it so important that the extinctions occurred soon after humans arrived on a new continent?
People were populating the earth really fast, so they needed more food, clothes, and shelter, such as tee-pees.
The causes of some of the earliest extinctions such as the Permian extinction are because humans started changing the earth?
A+ False
How may the Earth's position in space be related to the cycle of extinctions earth?
How may the Earth's position in space be related to the cycle of extinctions on earth
What is Nemesis and what does it have to do with impact craters and extinctions on Earth?
Nemisis
What has changed most of the mass extinctions on earth?
climate change
The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or?
A large comet or asteroid striking earth
The fossil record indicates that Earth has experienced?
5 mass extinctions
When geologists refer to the Big Five what are they referring to?
When geologist refer to the Big Five they are referring to the five mass extinctions on Earth. Some of these extinctions are the Paleozoic and Mesozoic eras.
When geologist refer to the big five what are they referring to?
When geologist refer to the Big Five they are referring to the five mass extinctions on Earth. Some of these extinctions are the Paleozoic and Mesozoic eras.
When geologists refer to the big five' what are the referring to?
When geologist refer to the Big Five they are referring to the five mass extinctions on Earth. Some of these extinctions are the Paleozoic and Mesozoic eras.
Is Earth is in danger of another mass extinction?
Mass extinctions occur when the conditions on Earth change faster than species can adapt. Since humans have greatly changed the conditions on Earth and continue to change them at rapid rates, a mass extinction is a likely possibility if nothing is done to reverse or stop the changes (mainly the amount of carbon dioxide being released to the atmosphere). Another common cause of mass extinctions are extraterrestrial which cannot be predicted and are somewhat spontaneous.
What is the group with the most extinctions?
This is an interesting question and not one that is easily answered. In terms of the entire history of life on earth the groups of individual species that have been around the longest would have experienced the most extinctions. The more complex the animal the fewer organisms produced and therefore the fewer species available for extinction. This makes various unicelluar organisms (animal, plant and bacterial) subject to the most extinctions. Even though several mass extinctions have occurred, the focus is primarily on the larger identifiable organisms of the time, (Dinosaurs for example), especially those that have a fossil record proving they existed. This places the focus on complex plants and animals. Focus is often on man caused extinctions as well...which are, on the whole, a very small number in the grand scheme of the history of life on Earth. The primary concept to remember is that: Extinction is the rule, NOT the exception.
