When paleontologists refer to the "big five," to what are they referring?

When paleontologists refer to the "Big Five", they are referring to the big five mass extinction events:

-The Ordovician-Silurian extinction events, which happened about 450 million years ago, killing almost 85% of the existing species.

-The Late Devonian extinction, which happened 370 million years ago, finishing more than 80% of the existing species.

-The Permian-Triassic extinction event, which happened 250 million years ago, killing more than 95% of the species of that time.

-The Triassic-Jurassic extinction event, that happened 210 million years ago, ending with almost 76% of the existing species.

-The Cretaceous-Paleogene extinction event, which happened 65 million years ago, ending with more than 75% of the existing species.

1. means it belongs to you.   (d. unalienable)

2. a time when money loses its value.   (e. inflation)

3. a meeting of people organizations for a special purpose.   (a. convetion)

4. president of constitutional convention.   (b. george washington)

5. refuse to attend the constitutional convention.   (f. rhode island)

6. it’s congress favored the big states.   (g. virginia plan)

7. it’s congress favored the small states.   (i. new jersey plan)

8. did not sign the constitution.   (f. rhode island)

9. it’s vote made the constitution legal   (c. new hampshire)

10. the introduction of the constitution.   (a. convention)