5 Mass Extinctions

How many mass extinctions has our planet witnessed in the last half a billion years?

• 1

• 2

• 4

• 5

What was the first great mass extinction that came about 440 million years ago?

• Ordovician

• Devonian

• Permian

• Triassic

What percentage of all species disappeared during the Late Ordovician mass extinction

• 25%

• 80%

• 60%

• 33%

The booming growth of plants on land removed what from the atmosphere?

• Nitrogen

• Carbon Dioxide

• Oxygen

• Helium

What is the third mass extinction that occurred 250 million years ago?

• Devonian

• Cretaceous

• Permian

• Triassic

What percentage of all species died out during the Permian Extinction?

• 45%

• 96%

• 4%

• 75%

What was the fourth mass extinction that occurred?

• Triassic

• Cretaceous

• Ordovician

• Permian

The ash and gas that came from erupted volcanoes lowered what?

• Carbon Dioxide

• Oxygen

• Nitrogen

• Helium

How many million years ago did an asteroid hit Earth and leave a huge crater in the Yucatan Peninsula?

• 15

• 100

• 65

• 42

What percentage of all animals and plants went extinct in a matter of years?

• 75%

• 10%

• 50%

• 99%