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General Knowledge Ancient Indian History Medieval Indian History Modern Indian History World History Indian Polity & Constitution Indian Governance Indian Economy International Relations Science & Technology General Science Environment & Ecology Indian Geography World Geography Indian Society Art & Culture Ethics, Integrity & Aptitude Quantitative Aptitude Reasoning English Language

What caused the fifth mass extinction, which killed the dinosaurs?

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1. The term ‘sixth mass extinction’ is often discussed in the context of what?

Widespread reforestation efforts worldwide

Large-scale cultivation of genetically modified crops for cheaper food

Fears of a future meteorite collision with Earth

Mankind entering an era of unprecedented biodiversity loss due to human activity

2. What caused the fifth mass extinction, which killed the dinosaurs?

A meteorite collision with Earth about 65 million years ago

Volcanic carbon fertilization

A magnetic field reversal

Human hunting and agriculture

3. How does the sixth mass extinction differ from the five previous ones?

It is caused entirely by solar activity

It only affects marine species

It is driven by a single species rather than a planetary physical process

It is not actually happening at all

4. Roughly how much higher are current extinction rates compared to natural background rates?

1,000 to 10,000 times higher

About twice as high

Ten times lower than natural rates

Exactly the same as natural rates

5. Why do some scientists say the sixth mass extinction could in principle be reversed?

Because it has already fully reversed itself

Because past mass extinctions were also reversible

Because extinction has never actually reduced any species

Because a single species, not a physical process, is causing it

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