Science·Dinosaurs & Paleontology·conceptual
The K-Pg Extinction Event
Describe the Cretaceous–Palaeogene (K-Pg) extinction event approximately 66 million years ago, including the asteroid impact theory and its evidence (iridium layer, Chicxulub crater), and understand that this ended the reign of non-avian dinosaurs
Suggested ages 9–11
Learning journey
Your child is exploring how scientists study dinosaurs through fossils — learning about dinosaur classification, evolution into birds, extinction events, and how paleontologists uncover and interpret evidence from millions of years ago.
Evidence of understanding
- State that the K-Pg extinction happened about 66 million years ago and wiped out non-avian dinosaurs
- Describe the asteroid impact hypothesis and name the Chicxulub crater in Mexico
- Explain one piece of evidence: the iridium-rich layer found worldwide in rocks from that time
Assessment prompt
Can The K-Pg Extinction Event explain what scientists think caused the dinosaurs to go extinct — and describe at least one piece of evidence for the asteroid theory?
Standards alignment
No external standards are linked to this topic.