Question

which best supports the evidence that an asteroid collision may have caused the extinction of dinosaurs? (1 point) ○ many dinosaur skeletons are found in one particular rock layer. ○ dinosaur fossil remains are found at the bottom of a body of water. ○ rare metal on earth called iridium is found in layers where dinosaurs disappeared. ○ bodies of dinosaurs are only found in craters where asteroid collided.

Explanation:

To determine which option supports the asteroid - dinosaur extinction link, we analyze each choice:

• Option 1: Finding many dinosaur skeletons in one rock layer just shows a concentration of fossils at a time, not related to an asteroid.
• Option 2: Dinosaur fossils at the bottom of water bodies relates to sedimentation or aquatic environments, not asteroids.
• Option 3: Iridium is rare on Earth but common in asteroids. Its presence in dinosaur - extinction rock layers suggests an asteroid impact (as the impact would deposit iridium - rich dust).
• Option 4: Dinosaurs being only in asteroid - collision craters is unlikely, as fossils are found in many areas, not just craters.

Answer:

C. Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.