Mass extinction - More than 50% of the population went extinct in a short period of time.
Background extinction - An average rate of extinction occurred during a given time period.
the holocene extinction
The death of every member of a species is called extinction. When a large number of different species is dies out at the same time it is called mass extinction.
genocide
Mesozoic
An asteroid impact caused a mass extinction about 65 million years ago
Both involve at least a few species dying out because of failure to adapt to the changing environment.
Most extinctions occur as background extinctions because they are longer time periods unlike the shorter mass extinctions which there were only two in the Paleozoic era, the Ordovician mass extinction, and the Permian/Triassic extinction in which 95% of all marine animals became extinct
The effect of mass extinction is extinction, death of a mass
It is the fate of most living things eventually to go extinct. standard commonplace rate of extinction not associated with a mass extinction.
Mass extinction
There were five major extinction events in the past. They are called the Cretaceous-Tertiary (or K-T) extinction event, the late Devonian mass extinction, the Permian mass extinction, the Ordovician-Silurian mass extinction and the Triassic-Jurassic mass extinction event.
the holocene extinction
The background rate of extinction is much smaller than those that occur during a mass extinction. For example, carnotaurus sastrei went extinct during the mid-Cretaceous, when only a handful of dinosaurs went extinct. On the other hand, 65 million years ago, all dinosaurs went extinct during the K/T mass extinction event.
The dinosaurs fell victim to a mass extinction.
This would be called a mass extinction or mass die off.This would be called a mass extinction.
540 million years ago was the first mass extinction
We are still not sure what caused the mass extinction of the dinosaurs, though an asteroid impact seems to be the popular theory.Scientists believe we may be heading towards another mass extinction event.