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Assignment 11 When Dinosaurs Chilled in the Arctic
GSC 3200: BLUE PLANET
Homework Videos:
When Dinosaurs Chilled in the Arctic
https://www.youtube.com/watch?v=5Ier8c9WFzE&t=117s
- What were the temperature and life conditions in the Arctic in the winter during the Cretaceous?
- When and where were the first dinosaurs found in Alaska?
- How did scientists figure out the temperatures of the Arctic in the Cretaceous?
- How did the histology of the dinosaur bone tell us whether they lived in the polar winters, or migrated? What did the histology show?
- What did the juvenile Edmontosaurus suggest about their migration or lack of migration?
- How did Troodon survive in Arctic conditions?
- What is phenotypic plasticity?
- What was Nanuqsaurus like? Why was it smaller than T. rex?
- How did Arctic dinosaurs change their ecological strategies to survive?
Assignment 11 When Dinosaurs Chilled in the Arctic Answer
- What were the temperature and life conditions in the Arctic in the winter during the Cretaceous?
Answer: It was cold, around the temperature of -10oC. It was dark for about 4 months at a time, and most of the plants there had to shut down for the winter due to the lack of sunlight.
- When and where were the first dinosaurs found in Alaska?
Answer: Hadrosaurs, which was discovered in 1961 and rediscovered in 1980s.
- How did scientists figure out the temperatures of the Arctic in the Cretaceous?
Answer: Through paleosols or fossil soils.