Which of the following are possible causes for mass extinctions on Earth?
A) gamma ray bursts and supernova explosions
B) episodes of widespread volcanism
C) magnetic field reversals
D) all of these can be responsible for mass extinctions

Question

Quizplus · Accepted Answer

All of these are possible causes for mass extinctions on Earth. Gamma ray bursts and supernova explosions can cause destruction of the ozone layer, leading to increased radiation on Earth. Episodes of widespread volcanism can release large amounts of gases and ash into the atmosphere, leading to climate change and ecosystem disruption. Magnetic field reversals have been proposed to cause increases in radiation and impacts on migratory species.

Which of the Following Are Possible Causes for Mass Extinctions