Wednesday November 28, 2012
description
Transcript of Wednesday November 28, 2012
![Page 1: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/1.jpg)
WednesdayNovember 28,
2012(The Phanerozoic Eon:
The Mesozoic Era – The Age of Reptiles)
![Page 2: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/2.jpg)
The Launch PadWednesday, 11/28/12
The beginning of the Cambrian Period marks an important event
in animal evolution, the appearance of organisms with
__________________.A. wingsB. cells
C. shells and other hard partsD. vertebrae
E. none of the above
![Page 3: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/3.jpg)
AnnouncementsHappy Make Your Own Head Day!
![Page 4: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/4.jpg)
AnnouncementsIf you would like to keep
your Solar Interior Poster, please remove it from the
hallway before close of school today.
![Page 5: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/5.jpg)
Assignment Currently Open
Summative or
Formative?Date Issued Date Due Date Into
GradeSpeed Final Day
Quiz 11 S1 11/9 11/9 11/30Lab – The
Geologic Time Scale
F3 11/14 11/16 11/30
Quiz 12 S2 11/16 11/16 12/7WS - The
Precambrian Eon: Formation of
Continents and Steps Leading to Higher Life Forms
F4 11/26 11/30 11/30
WS - The Phanerozoic Eon: The Paleozoic Era
- Life ExplodesF5 11/27 11/30 11/30
![Page 6: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/6.jpg)
Recent Events in Science'Pac-Man' Moons: Cassini Finds a Video Gamers'
Paradise at Saturn
www.sciencedaily.com/releases/2012/11/121126151127.htm
Read All About It! You could call this "Pac-Man, the
Sequel." Scientists with NASA's Cassini mission have spotted a second feature shaped like the 1980s video game icon in the
Saturn system, this time on the moon Tethys. (The first was
found on Mimas in 2010). The pattern appears in thermal data
obtained by Cassini's composite infrared spectrometer, with
warmer areas making up the Pac-Man shape.
![Page 7: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/7.jpg)
![Page 8: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/8.jpg)
The Phanerozoic Eon The Mesozoic Era
The supercontinent of Pangaea existed during the
late Paleozoic and early Mesozoic eras, forming
about 300 million years ago.
![Page 9: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/9.jpg)
The Phanerozoic Eon The Mesozoic Era
Pangaea began to rift around 200 million years ago, first forming the two continents of
Laurasia and Gondwana.
Laurasia included most of the landmasses which make up today's continents of the
Northern Hemisphere, chiefly North American continent,
Baltica, Siberia, Kazakhstania, and the North China and East China cratons.
Gondwana was the southern-most of two and included most of the landmasses in
today's Southern Hemisphere, including Antarctica, South
America, Africa,Madagascar and the Australian continent, as well as
the Arabian Peninsula and the Indian subcontinent, which have now moved entirely into the Northern Hemisphere.
![Page 10: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/10.jpg)
The Phanerozoic Eon The Mesozoic Era
Early in the Mesozoic Era, much of present-day North America was above sea level, but by the middle Mesozoic, seas invaded the western regions of the continent.
![Page 11: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/11.jpg)
The Phanerozoic Eon The Mesozoic Era
As Pangaea continued its rift, the westward-
moving North American plate began to override
the Pacific plate.
This resulted in crustal deformation along the entire western margin
of North America.
The Sierra Nevada and Rocky Mountains were
formed at this time.
![Page 12: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/12.jpg)
The MesozoicThe Phanerozoic Eon
The Mesozoic Era was
known as the “Age of
Reptiles.”
Reptiles became the dominant
land animals.
![Page 13: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/13.jpg)
The first reptiles were small, but evolved rapidly, particularly the dinosaurs.
The Phanerozoic Eon
![Page 14: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/14.jpg)
Diversity of reptiles included:
• large herbivorous dinosaurs such as Apatosaurus
•large carnivorous dinosaurs such as Allosaurus
•Pterosaurs or flying reptiles
•Archaeopteryx, the predecessor of modern birds
The Phanerozoic Eon
![Page 15: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/15.jpg)
Archaeopteryx fossilArchaeopteryx
fossil
![Page 16: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/16.jpg)
Ichthyosaur Fossil, a marine reptile
![Page 17: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/17.jpg)
Dinosaur Tracks
![Page 18: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/18.jpg)
The MesozoicThe Phanerozoic Eon The early
Mesozoic Era consisted of the Triassic Period.
![Page 19: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/19.jpg)
The middle Mesozoic Era
consisted of the Jurassic Period.
The MesozoicThe Phanerozoic Eon
![Page 20: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/20.jpg)
The late Mesozoic Era consisted of
the Cretaceous Period.
The MesozoicThe Phanerozoic Eon
![Page 21: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/21.jpg)
About 65 Mya, at the close of the Mesozoic Era, an impactor with an estimated
diameter of 6.2 miles struck the Earth near the present-day Yucatan Peninsula of
Mexico.The impact delivered an estimated energy
equivalent of 100 teratons (100 trillion tons) of TNT.
By contrast, the most powerful man-made explosive device ever detonated, the Tsar Bomba, had a yield of only 50 megatons
( 50 million tons) of TNT.This makes the Chicxulub impact 2 million
times more powerful.Even the most energetic known volcanic eruption, which released approximately
240 gigatons (240 billions tons) of TNT and created the La Garita Caldera,
was substantially less powerful than the Chicxulub impact.
The Phanerozoic Eon
www.youtube.com/watch?v=5qJPTjMnwNk
![Page 22: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/22.jpg)
A few types survived, including the turtles, snakes,
and lizards.
As a result of the Chicxulub impact,
many reptile groups became
extinct.
The Phanerozoic Eon
![Page 23: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/23.jpg)
The elimination of the dinosaurs and
other reptiles cleared the way for
the rise of the mammals, who, up to this point, had
consisted of small, hole-dwelling
creatures.
The Phanerozoic Eon
![Page 24: Wednesday November 28, 2012](https://reader036.fdocuments.net/reader036/viewer/2022062302/56816552550346895dd7cac9/html5/thumbnails/24.jpg)
WorksheetThe Phanerozoic Eon:
The Mesozoic Era – The Age of Reptiles