Part 2: Mass Extinctions: follow the direction on the directions sheet Mass MYA What was Earth’s surface like? Average O2 (%) CO2 Day Biodiversity Extinction Landmasses? Proportion of land to water? Surface (ppm) Length % genera What happened? Temp. loss, oC # species loss Ordovician Devonian Permian Triassic Cretaceous Present
Part 2: Mass Extinctions: follow the direction on the directions sheet Mass Extinction MYA What was Earth’s surface like? Landmasses? Proportion of land to water? What happened? Average Surface Temp. oC O2 (%) CO2 (ppm) Day Length Biodiversity % genera loss, # species loss Ordovician Devonian Permian Triassic Cretaceous Present
APES%202017%20Summer%20Assignment.docx