Science
Dinosaurs & Paleontology
Conceptual
9–11 yrs
The K-Pg Extinction Event
白垩纪-古近纪灭绝事件
Description
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
Mastery Evidence
- 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 your child explain what scientists think caused the dinosaurs to go extinct — and describe at least one piece of evidence for the asteroid theory?
