1.What are the Mass extinctions?

1. Ordovician-Silurian Extinction
2. Late Devonian Extinction
3. Permian-Triassic Extinction
4. Triassic-Jurassic Extinction
5. Cretaceous-Paleogene Extinction
6. Holocene Extinction

2. What is the Ordovician-Silurian death rate?

The Ordovician-Silurian death rate is 85%.

3.What is the Late-Devonian death rate?

The Late Devonian death rate is 70%.

4.What is the Permian-Triassic death rate?

The Permian-Triassic death rate is 95%.

5.What is the Triassic-Jurassic death rate?

The Triassic-Jurassic death rate is 76%.

6.What is the Cretaceous-Paleogene death rate?

          The Cretaceous-Paleogene death rate is 80%

7.what is the biggest Extinction in the world?

          The biggest Extinction in the world is Permian- Triassic.

8.When did the Ordovician-Silurian extinction started?

          The Ordovician-Silurian extinction started 440 Million years ago.

9.When did the Late Devonian extinction started?

          The Late Devonian extinction started 365 Million years ago.

10.When did the Permian-Triassic extinction started?

          The Permian-Triassic extinction started 252 Million years ago.

11.When did the Triassic Jurassic extinction started?

          The Triassic-Jurassic extinction started 201 Million years ago.

12.When did the Cretaceous-Paleogene extinction started?

          The Cretaceous-Paleogene extinction started 66 Million years Ago.

13.When did the Holocene extinction started?

          The Holocene extinction started 11,700 years Ago.