Question

What are extinction periods?




please help

Answer 1

Answer: Ordovician-Silurian extinction - 444 million years ago.

Late Devonian extinction - 383-359 million years ago.

Permian-Triassic extinction - 252 million years ago.

Triassic-Jurassic extinction - 201 million years ago.

Cretaceous-Paleogene extinction - 66 million years ago.

Step-by-step explanation:

Answer 2

The extinction of a large number of species within a relatively short period of geological time, thought to be due to factors such as a catastrophic global event or widespread environmental change that occurs too rapidly for most species to adapt. ... Compare background extinction.