3/3 & 3/4 - 7th Grade Agenda Learning Objective: Discuss how dinosaurs are similar to birds Collect HW: Reading & Notetaking p.151 -152 Video: Walking w/ Monsters before Dinosaurs Textbook Reading: 279 - 285 HW: Review & Reinforce p.107 & 110 Reminder: Chap 8 Test on 3/5 & 3/6

Reflection Prompt: Write 3 facts that you know about the dinosaurs.

Development of Atmosphere

What happened during Paleozoic Era 544 – 245 Million Years ago? Cambrian Explosion: At the beginning of the Paleozoic Era, a great number of different kinds of organisms evolved.

Cambrian Period – Explosion of Life in the sea (544 Million Years ago)

Devonian Period – Animals invade the land (408 Million Years Ago)

Permian Period (286 Million Years Ago)

End of the Permian Period, there was a mass extinction – (245 Million years ago) 95% of life in the oceans disappeared What do you think might have cause the mass extinction?

Mesozoic Era – Triassic, Jurassic Cretaceous Period (245 – 66 Million Years ago)

End of Cretaceous Period, there was another mass extinction (66 Million years ago) Where did the asteroid hit? Asteroid hit near southeastern Mexico (Yucatan Peninsula) When the asteroid hit Earth, the impart threw huge amount of dust and water vapor into the atmosphere

Which animal is the closest living relative of Dinosaurs? Birds are considered to be closest relatives of dinosaurs

Cenozoic Era – Age of Mammals (65 Million Years to Present)

Reflection Prompt: Write 5 facts that you learned in the video.