Mass Extinction Events and Drivers: PTE Listening: Fill in the Blanks practice questions

Large igneous provinces represent some of the most destructive volcanic episodes in Earth history. Unlike isolated volcanic peaks, these colossal eruptions poured millions of cubic kilometres of molten rock across entire over prolonged intervals. The sheer volume of released volcanic gases caused immediate atmospheric on a global scale. Sulphur dioxide generated dense aerosol veils that blocked sunlight and triggered severe cooling, which was subsequently replaced by extreme greenhouse warming as carbon dioxide accumulated. This violent climatic overwhelmed terrestrial and marine ecosystems alike, as living organisms could not adapt rapidly enough to the fluctuating thermal and disrupted seasonal weather cycles.

The sudden arrival of a large extraterrestrial body creates immediate and devastating ecological shocks. Upon collision, the immense energy release vaporises target rock and ejects finely powdered high into the stratosphere. This dense dust canopy effectively enveloped the entire planet, plunging ecosystems into prolonged and halting primary production. Without sunlight, terrestrial plants and photosynthetic plankton perished rapidly, triggering the collapse of interconnected food across both land and sea. Furthermore, the heat generated by returning impact spherules ignited widespread wildfires, which introduced copious amounts of soot into an already compromised system.