Pre-6th Extinction
The number of mass extinctions that have occurred
What are 5 extinctions?
Unlike other mass extinctions, the Sixth Great Extinction is caused by
What is human activity?
The definition of extinction
What is the complete disappearance of a species from Earth?
The deadliest extinction (most species lost)
What is the Permian extinction?
The frequency of a type of extinction that is naturally occurring and is necessary for ecological processes
What is the background extinction rate?
The author of Atlas
Who is Terisa Siagatonu?
T/F: the Ordovician-Silurian extinction allowed dinosaurs to flourish
What is false?
This type of extinction is the result of another species going extinct
What is coextinction?
The % of species lost required to be considered a mass extinction
What is 75%?
Three causes of past extinctions
What are glacial periods, global warming, global cooling, sea level changes, volcanic activity, ocean chemistry changes, or asteroid impacts?
By the end of this century, Earth is estimated to have lost 50% of its biodiversity
What is the 21st century?
The author of Staying with the Trouble
Who is Donna Jeanne Haraway?
The name of an extinction and how long ago it occurred
What is:
Ordovician-Silurian - 440 million yrs
Devonian - 360 million yrs
Permian - 250 million yrs
Triassic - 200 million yrs
K-T (Cretaceous-Tertiary) - 65 million yrs
Aligned with tentacular thinking, this phenomenon highlights the importance of each organism in a food chain
What is trophic cascade?
The human activity resulting in an extreme disruption of marine life
What is overfishing?