Global Extinction: How Long Do We Have Left?

When did the Permian Extinction occur?

• 1 billion years ago

• 4.5 billion years ago

• 252 million years ago

• 500 million years ago

How many species have evolved on Earth?

• 500 million

• 1 billion

• 4.5 billion

• 5 billion

What is the theory that explains the survival of the fittest?

• Theory of Natural Selection

• Theory of Evolution

• Theory of Adaptation

• Theory of Extinction

How many mass extinctions have occurred in the last 500 million years?

• 7

• 6

• 5

• 8

When did the Sixth Mass Extinction begin?

• 500 million years ago

• 4.5 billion years ago

• 1 billion years ago

• Middle of the 20th century

What has been the impact of human production of CO2 on the Earth's climate?

• Warmed the planet by almost 1-degree Celsius

• Cooled the planet by almost 1-degree Celsius

• Warmed the planet by almost 10-degree Celsius

• No significant impact on the planet's temperature

What percentage of terrestrial habitats has been affected by the sixth mass extinction event?

• 75%

• 50%

• 25%

• 10%

How many vertebrate species have gone extinct in the last 100 years?

• 200

• 100

• 50

• 25

What is the current rate of extinction compared to the background rate?

• Same as the background rate

• 5 times faster

• 10 times faster

• Over 100 times faster