Mass Extinction: Dinosaurs

The video explores the debated causes of dinosaur extinction, focusing on two main theories: the Catastrophes theory, which attributes extinction to a massive asteroid impact, and the Gradualists theory, which suggests a gradual decline due to volcanic activity and climate change. Both theories highlight significant climate changes that led to the extinction of dinosaurs and many other species, paving the way for mammals to thrive.

What are the two main theories about the extinction of dinosaurs?

• Catastrophes and gradualists

• Volcanic eruptions and earthquakes

• Evolution and adaptation

• Meteorites and comets

What evidence supports the Catastrophes theory of dinosaur extinction?

• Increased volcanic activity

• Presence of Iridium in the Earth's crust

• Gradual decline in dinosaur population

• Rise in sea levels

What is a significant consequence of the asteroid impact according to the Catastrophes theory?

• Increase in dinosaur population

• Massive dust clouds blocking sunlight

• Rise in global temperatures

• Formation of new species

According to the gradualists, what natural phenomenon contributed to the extinction of dinosaurs?

• Earthquakes

• Flooding

• Volcanic eruptions

• Asteroid impact

What is the agreed-upon factor that led to the extinction of dinosaurs?

• Human intervention

• Increased predation

• Massive climate change

• Lack of food