Question

scale. The scientists have also found the following three pieces of evidence. 1. Evidence of dinosaur fossils were found in rock layers older than the iridium layer. 2. Evidence of dinosaur fossils were NOT found in rock layers younger than the iridium layer. 3. Iridium is not found in high concentrations in Earth layers but is abundant in asteroids. What does this information most likely show about Earth's history and dinosaurs? A. Iridium was produced on Earth's surface by sedimentation and helped dinosaurs thrive on Earth. B. A large asteroid collided with Earth and helped dinosaurs thrive on Earth. C. A large asteroid collided with Earth and killed off the dinosaurs. D. Iridium was produced on Earth's surface by sedimentation and killed off the dinosaurs.

Answer 1

The evidence suggests that a large asteroid collision caused the extinction of dinosaurs.

Step-by-step explanation:

Based on the evidence provided, the most likely explanation for the extinction of dinosaurs is that a large asteroid collided with Earth. The presence of iridium in high concentrations in the boundary between the Cretaceous and Paleogene periods supports this hypothesis. The iridium found in the rock layers is believed to have come from the asteroid, which caused catastrophic effects on Earth and led to the extinction of dinosaurs and many other species.