geological history. earth’s formation a a watch this video first, and
TRANSCRIPT
![Page 1: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/1.jpg)
Geological HistoryGeological History
![Page 2: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/2.jpg)
EarthEarth’’s Formations Formation• http://www.youtube.com/watch?
v=QDqskltCixA
• Watch this video FIRST, and take a few notes on the formation of Earth.
• Then after the video you will have 3-4 minutes to write down a paragraph 4-5 sentences long that summarizes the formation of Earth…
• I will pick 3 people to read.
![Page 3: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/3.jpg)
First, What is Earth Like Inside?First, What is Earth Like Inside?
• Write down a diagram in your notes and describe the layers of the Earth…
• Describe if each layer is liquid, solid, hot, cold…ect.
![Page 4: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/4.jpg)
![Page 5: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/5.jpg)
![Page 6: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/6.jpg)
What is Continental Drift?What is Continental Drift?• Proposed by Wegener-1915
• Theory that states that all the plates move and the continents were once a single landmass which split apart…Pangaea
• Precursor to theory of plate tectonics
![Page 7: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/7.jpg)
![Page 8: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/8.jpg)
![Page 9: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/9.jpg)
![Page 10: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/10.jpg)
![Page 11: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/11.jpg)
Evidence for Plate TectonicsEvidence for Plate Tectonics
• What 3 pieces of evidence do you think we have for continental drift?
• List them in your notes.
![Page 12: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/12.jpg)
Evidence 1Evidence 1
• All of the continents fit together like a puzzle
![Page 13: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/13.jpg)
Evidence 2-FossilsEvidence 2-Fossils• Identical Fossils were located directly opposite on
widely spaced apart continents
![Page 14: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/14.jpg)
Evidence 3-Rock TypeEvidence 3-Rock Type
• Similar rock types, age and structure found on different continents
• Ex:Appalachians and mountains in Scotland/Scandi-navia
![Page 15: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/15.jpg)
Why do plates Why do plates ““floatfloat”” and what and what do they float on?do they float on?
• Isostasy- The crust floats on the mantle since the crust is less dense.
• The heavier the crust, the more it will push on the mantle
• Mantle is not “liquid” like we think of it…it flows like glass.
![Page 16: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/16.jpg)
Isostasy ExamplesIsostasy Examples• In areas formerly covered by ice sheets (around
the Baltic Sea and Hudson Bay, for example), sea cliffs and beach ridges are now found nearly 300 m (1000 feet) above sea level!
• Why?
![Page 17: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/17.jpg)
How do plates push apart?How do plates push apart?
• http://www.youutbe.com/watch?v=CFtce8bYJO8• Convection: http://www.youtube.com/watch?
v=ryrXAGY1dmE• Sea Floor Spreading- Magma pushes up in a ridge
on the ocean floor and creates new crust—pushing the crust apart
• In ocean trenches the crust moves down and melts
![Page 18: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/18.jpg)
![Page 19: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/19.jpg)
Proof of Seafloor SpreadingProof of Seafloor Spreading• Paleomagnetism-
– The Earth’s magnetic field has reversed throughout history.
– The element iron in the rocks in the ocean crust orients to the magnetic field as it is forming.
– Distinct patterns show the rock has the same orientation as it spreads apart.
![Page 20: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/20.jpg)
![Page 21: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/21.jpg)
Before the Bell…Before the Bell…
• Take out your Notes from Friday • Take out your notes from the Red Book• Answer this question in your
– What is the theory of plate tectonics…be specific…and what proof do we have? What drives plate tectonics…
– What are the 2 types of plates– What are the 3 types of plate movements– What are the 7 plate boundary situations and
features?
![Page 22: Geological History. Earth’s Formation A A Watch this video FIRST, and](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0011a28abf838cc2afa/html5/thumbnails/22.jpg)
Results of Plate MovementResults of Plate Movement• Earthquakes- (this video puts it all
together!)https://www.youtube.com/watch?v=cavq2HFBa-U
• Current World Earth Quakes (Google Earth)-• Tsunami Animation-
http://www.youtube.com/watch?v=4Xebwzb3dDE• Tsunami Footage-
http://www.youtube.com/watch?v=RDOuwMj7Xzo• https://www.youtube.com/watch?v=w3AdFjklR50