Table of Contents
- 1 Which of the following is supported by the theory that dinosaur extinction at the end of the Cretaceous period was caused by a meteorite impact?
- 2 What is the most widely accepted theory about the extinction of the dinosaurs?
- 3 What caused the Cretaceous-Tertiary extinction event?
- 4 Did poor eyesight make life difficult for dinosaurs?
Which of the following is supported by the theory that dinosaur extinction at the end of the Cretaceous period was caused by a meteorite impact?
Most scientists agree on the asteroid impact theory as the main explanation for the Cretaceous-Paleogene extinction. According to this theory, a huge asteroid struck the Yucatan Peninsula between 65 and 66 million years ago, creating the Chicxulub crater.
What is the most widely accepted theory about the extinction of the dinosaurs?
The Alvarez hypothesis
Any fragment of an asteroid that survives landing on Earth becomes known as a meteorite. The Alvarez hypothesis was initially controversial, but it is now the most widely accepted theory for the mass extinction at the end of the Mesozoic Era.
How did the meteor that killed the dinosaurs affect the Earth?
The scientist in charge, Paul Renne of UC Berkeley says that the impact of the meteor sped up volcanic eruptions worldwide. He says that volcanic activity doubles in the 50,000 years following the impact of the meteor, and that the dinosaurs became extinct within this 50,000 year period.
Why did the dinosaurs go extinct?
Why Did the Dinosaurs Go Extinct? You likely learned in elementary school that the dinosaurs went extinct because of a huge asteroid hitting the earth. While the impact theory is the most widely accepted theory today, the theory is a bit more complicated than a massive impact killing everything.
What caused the Cretaceous-Tertiary extinction event?
Contents. The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs’ food supply.
Did poor eyesight make life difficult for dinosaurs?
It’s well established that dinosaur brains and limbs often let them down (poor T-rex), but a theory proposed by an ophthalmologist suggests that their eyesight might have made life difficult too and could even have led to their downfall.