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.
extinction
Extinction of a single species can occur at any time if said species in hunted excessively, but mass extinction only occurs every 27 to 33 million years.
A major extinction event.
The largest extinction event known is the Permian-Triassic Extinction Event, 250 million years ago. It is nicknamed "The Great Dying" in reference to how 96% of all known marine animals and 70% of all known terrestrial vertebrates at the time went extinct due to climatic changes because of volcanic eruptions and the formation of Pangaea.
Evolution is the term that describes development of new species and mass extinction. Over time all living thing have evolved.
Evolution.
A background extinction is the continuous extinction of individual species caused by climate change, disease, loss of habitat, and competitive disadvantages against other species. Background extinctions occur at a slow rate over time, affecting only a few species at one time.
A+ mass extinction
Mass extinction
Mass Extinction
Mass Extinction