Mass Extinction Flashcards
1
Q
More than 40% of _ species currently at risk of extinction
A
Amphibians
2
Q
Mass extinction is global event where major portion of species become extinct in _
A
Short amount of geological time
3
Q
There have been _ major mass extinctions on earth
A
5
4
Q
Geological time is divided into named sections known as
A
Periods
