How We Proved an Asteroid Wiped Out the Dinosaurs (7:28)
Key Ideas
As this video progresses, key ideas will be introduced to invoke discussion.
Key Ideas
Think about the following questions as you watch the video
- 02:55 When Alvarez explored the clay between the Cretaceous and Tertiary rocks, what clue did the clay provide, and why were members of his team surprised by what they found?
- 04:03 What did Alvarez think about the energy of the asteroid impact and the effect it might have had on the biosphere?
- 04:24 Why was the claim that the dinosaurs became extinct because of an asteroid impact initially met with skepticism by some?
- 04:38 What was the second set of clues discovered by scientists to support the claim that an asteroid impact destroyed the dinosaurs?
- 06:29 What was the third clue found to support the claim that an asteroid impact destroyed the dinosaurs?
- 07:15 How is the development of the story of the asteroid impact that killed the dinosaurs an example of the scientific method at work?