An asteroid
One type of catastrophic change that can cause a mass extinction is an asteroid impact. When a large asteroid collides with the Earth, it can release massive amounts of energy, cause widespread destruction, trigger tsunamis and wildfires, and create a global "impact winter" due to the release of dust and debris into the atmosphere. Such an event is believed to have caused the extinction of the dinosaurs 65 million years ago.
An asteroid from space, like the one that killed the dinosaurs, which was a mile in width.
The Hallicigenia Apeared in the Cambrian Peirod.
The extinction of a large number of species within a relatively short period of geological time. Caused by some catastrophic global event or widespread environmental change to which species can not adapt
An asteroid from space, and Gradualevents
Gasses released by a massive volcanic event can cause catastrophic climate changes. Carbon dioxide will raise global temperatures. while sulfur dioxide will lower temperatures.
Mass extinction. A mass extinction typically occurs after a catastrophic global event. This event could be a bolide impact (such as the impact 65 million years ago that killed the dinosaurs, the most famous example of a mass extinction), increased volcanism, climate change, or something similar.
mass extinction
An asteroid from space, like the one that killed the dinosaurs, which was a mile in width.
The Hallicigenia Apeared in the Cambrian Peirod.
The extinction of a large number of species within a relatively short period of geological time. Caused by some catastrophic global event or widespread environmental change to which species can not adapt
An asteroid from space, and Gradualevents
I think so.
The factors that generally cause mass extinction are changes in the natural ecosystem of the species. This may make it difficult for the species to reproduce and to stay alive.
Mass extinction could occur due to climate change, an asteroid impact and even a volcanic eruption.
The effect of mass extinction is extinction, death of a mass
Scientists believe the Cretaceous-Paleogene extinction event, or the plants dying at the end of the Mesozoic Era, was caused by a massive asteroid/comet impact. The theory suggests that the impact had catastrophic effects on the environment, including an impact winter, which prevented the plants from carrying out photosynthesis.
The better Q is "What was the cause of the triassic mass-Extinction?"