Transcript Freshwater reptile Mesosaurus

9.3 Bell Ringer
• Fossils of a fresh water
swimming reptile,
Mesosaurus (Figure 2) have
been found on the east coast
of southern Brazil and the
west coast of Africa. This
reptile could not possibly
have swum the 3,000-mile
distance across the South
Atlantic Ocean.
• How could we possibly
explain this? Write your
claim and evidence.
Discovering Plate Tectonics: The
Mystery of the Brachiosaurus
• Mystery of the Brachiosaurus Uncovered
Puzzle Key and Landmasses
• Try to figure out how to answer the question
of how Mesosaurus appeared on two
continents
1. Assemble the pieces so that they fit
together like a puzzle
2. When finished, raise your hand to be
checked.
3. Answer the questions #1-5 in Part 1 on
your worksheet
Continental Puzzle Analysis Questions
1. What made you put the puzzle pieces the way that you
did? Were there any clues that helped you put the
pieces a certain way?
2. What three kinds of evidence support Wegner’s theory
that South America was at one time joined with Africa?
Be specific! (hint: look at the key)
3. What dinosaur is found on almost every continent?
4. Since a dinosaur cannot swim, explain how a fossil can
be found on all continents?
5. It is generally considered that dinosaurs live in warm
climates, yet fossil remains are found in Antarctica.
Convection Current Demonstration
•
•
http://www.teachertube.com/viewVideo.php?video_id=137741
http://teachertube.com/viewVideo.php?video_id=261126&title=Convection_Currents
Action of the Red Dye
• What temperature was the red dye?
• In what direction did the red dye move?
• What do you think the density of the red dye is
compared to the water? Why?
Foam Plates
• What caused the foam plates to move?
• Describe the movement of the foam pieces when
the dye started to rise. Could you see a pattern?
Plate Tectonics: Understanding
Earth’s Shifty Surface Versatile
• Finish for homework
–Write letter and word for answers
–Cite evidence for each questions by
highlighting/underlining passage in
reading that supports answer
–All 12 numbers should be displayed on
reading to get credit!
Summary
• Answer questions #6 and #7 on your
sheet
6. The foam plates can be compared to the
continental plates on the earth’s surface. By
observing this lab, why do you think the
continental plates move on the earth’s surface?
7. How does this experiment model the moving
tectonic plates?
9.4 Bell Ringer
• What cases Earth’s tectonic plates to move?
Write your claim and at least 2 pieces
of evidence:
A.
B.
C.
D.
earth’s rotation on its axis
earth’s revolution around the Sum
tides and wind currents
convection currents in the mantle
Topic: The Lithosphere, Pangaea,
and Plate Tectonics
Continental Drift Cornell Notes
Key Terms
Summary:
Notes
1. Q: What is the lithosphere made up of?
A: Crust and Upper Mantle
Continental Drift
• Wegener came up with a theory in
1910 called Continental Drift.
• His theory said that the continents
had started as one big “super
continent” called Pangea.
Continental Drift
• Over millions of
years, Pangaea
broke apart into
the 7 continents.
Continental Drift
• During Pangaea, continents had
completely different environments.
Evidence that supported Wegener’s
Theory
1. Change in Climate
–Example: Glaciers in Africa
Glacial striations, the parallel "scrape" marks on rocks
caused by moving glaciers, have been found on rocks in
South America, Africa and Australia and are of similar
orientation to striations found on Antarctica
2. Puzzle-like Fit of the Continents
-Example: Africa and South America
In several cases, modern shorelines of continents look as
though they were once joined
Evidence that supported Wegener’s
Theory
3. Landforms
-Example: Mountain chains
Some mountain chains, have very similar rocks and
structures (i.e., folds and faults) to mountain belts
found on other continents
4. Fossil Evidence
-Example: Mesosaurus
There are many examples of fossils found on two
continents that are currently separated by vast oceans
Continental Drift Rejection
• Scientists at the time
rejected his theory
because he could not
come up with an
explanation why the
continents were
actually moving.
Theory of Plate Tectonics
• The lithosphere (crust and upper mantle)
is made of moving plates that float on the
asthenosphere.
• Convection currents cause magma in the
asthenosphere to rise and sink.
• The plates are slowly moving and bump
into each other
Discovering Plate Tectonics: Changes in Earth’s
Surface
Continental Drift Reading
“Draw a picture”- As I read the passage
aloud, draw (pictures) of what you are
hearing about evidence of continental drift.
*Try to draw at least one picture per
paragraph
Pangea Writing Prompt
• You are Wegener’s defense attorney. Using
your knowledge of the lithosphere,
asthenosphere, Pangaea, and evidence for
continental drift (190-195), write two
paragraphs that defend his hypothesis of
Continental Drift.
• Paragraph #1: Evidence
• Paragraph#2: Why do plates move? (what
he didn’t know, but we know now!)
9.5 Bell Ringer
Which of the following was NOT one of the pieces of
evidence that Alfred Wegener proposed to support his
ideas about Pangea. Write your claim and at least 2
pieces of evidence
A. He noticed that the coastlines of Africa and South
America looked like they might fit together
B. He found old aerial satellite photographs taken of
Pangea during the days of ancient Rome
C. He discovered evidence that the same plant and
animal fossils were found along the coasts of these
continents, although they were now separated by
vast oceans
D. He noticed that geologic formations, like mountain
ranges, on the two continents also matched up
Friday Stations
• Sketch a picture (if not finished)
• Types of Boundaries Graphic Organizer
• Questions and Answers Using Reading
– Support questions using evidence.
– Must NUMBER and HIGHLIGHT/UNDERLINE
– Write out entire answers (not just letter)
• Teacher Directed: Grade notebook
1. Continental Drift Puzzle & Convection Currents Video
2. Earth’s Shifty Surface Versatiles (evidence underline &
numbered)
3. Continental Drift Cornell Notes
4. Pangea Writing Prompt
5. Continental Drift Reading: Sketch a Picture