Download Week 22 - Continental Drift and Plate Tectonics

Week 22
CONTINENTAL DRIFT AND PLATE TECTONICS
Bell Ringer 21 - Monday
1. Sit quietly.
2. Copy the homework
in your agenda.
3. Add pgs. 127-130 to
your Table of
Contents.
4. On Pg.127, answer
the questions to the
right.
SCPASS Coach Book Reading
1. Group leaders get a couple PASS Coach
books for your group.
2. Turn to page 89.
3. We will Popcorn read the section
together.
4. While you read think about the different
ways in which the tectonic plates move
and the changes in landforms they cause
over time.
Plate Tectonics Notes
Plate Tectonics – The Beginning
The theory of plate tectonics explains
why and how large sections of Earth’s
crust, called lithospheric plates, move.
Alfred Wegener developed the
hypothesis of continental drift before
the present theory of plate tectonics.
Plate tectonics explains how many
Earth features form.
pg.128
The idea for Wegener's theory
was sparked by his observation
of the nearly perfect “fit” of the
South American and African
continents.
Evidence supporting the continental drift theory:
1. Continent shape – they seemed to fit together
2. Fossil Evidence – fossils of the same plants and animals
were found on different continents
3. Rock Formations – found nearly identical on east coast of
U.S. and west coast of Europe.
4. Climate Clues – glacial deposits found in current warm
climates and warm climate plant fossils found in Artic.
What are tectonic plates?
Earth’s sublayers Lithosphere: This layer
combines the rigid crust
plus the upper-most
mantle. (Greek: Rock)
Asthenosphere: Partially molten part of
upper mantle (Greek: weak). Tectonic plates
are able to move about on top of the softer,
partially molten asthenosphere.
The Earth‘s crust consists of about a dozen large slabs of
rock, or PLATES, that the continents and oceans rest on.
Tectonic plates are also called lithospheric plates.
Tectonic plates, or lithospheric plates, are constantly
moving, being created, and destroyed at the same time.
The motion sometimes results in earthquakes,
volcanoes, and mountain ranges at the plate boundaries.
Plate motion is driven by heat escaping from the mantle.
The constant movement of heat in the mantle leads to
circular convection currents. These hot convective cells
are similar to the rolling boil that occurs when water is
heated on a stovetop.
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Plate Boundaries
There are three basic ways that plates interact with
one another. Each of these plate boundaries has the
potential to create different geological features.
1. When plates collide with each other =
Convergent boundary
2. When plates separate from each other =
Divergent boundary
3. When plates slide alongside each other =
Transform boundary
Convergent Boundary:
Ocean – Continent Subduction
The more dense oceanic plate sinks and is subducted
beneath the continental plate.
This is called a subduction zone, where the old oceanic
plate is dragged downward and destroyed.
Deep-sea trenches are created over subduction zones
and volcanoes are created on land. Example: S.America
Convergent Boundary:
Ocean – Ocean Subduction
If 2 oceanic plates collide, the older, denser one is
subducted downward into the mantle.
A chain of volcanic islands can form, called a volcanic
arc.
Example: Mariana Islands (Mariana Trench) – Deepest
trench on Earth located in Pacific Ocean near Guam.
Convergent Boundary:
Continent-Continent Collision
If two continental plates collide, mountain building
usually takes place because they are both relatively low
in density.
Example: The Indo-Australian plate converges with the
Eurasian plate to form the Himalayan Mountains.
The Appalachian mountain chains are also an example.
Divergent Boundary
Two plates move away from each other create a crack
called a rift. New crust is formed from magma rising up
through the rift.
When this occurs with 2 oceanic plates we call it seafloor spreading.
Examples: The world‘s longest mountain chain is
underwater and is called the Mid-Atlantic Ridge in the
Atlantic Ocean. Plus the Great Rift Valley in Africa.
Transform Boundary
Two plates slide past each other.
Crust is neither created or destroyed.
Earthquakes occur frequently along this boundary.
Example: the San Andreas Fault in California.
Changes in Landforms over Time
Tectonic plates move slowly –
about 1 to 10 cm per year.
Alfred Wegener proposed that
all of the continents once
formed a ―supercontinent
called Pangaea.
As the plates continued to
move and split apart, oceans
were formed, landmasses
collided and split apart until the
Earth’s landmasses came to be
in the positions they are now.
Changes in Landforms over Time
Evidence of landmass
collisions and splits come
from fossils, continent
shape, rock structures,
and climate change.
Hot spots can show how
plates have moved. They
are areas of volcanic
activity in the middle of a
tectonic plate.
Plates will continue to
move and change in the
future.
Vocabulary Homework
1. Add the foldable to pg.129 in your
notebook.
2. Write the definition for each word behind
the flap.
3. Due tomorrow!!
*Take your textbook home if you aren’t using
the internet.
Bell Ringer 21 - Tuesday
1. Sit quietly.
2. Copy the homework
in your agenda.
3. Add pgs. 131-132 to
your Table of
Contents.
4. On Pg.127, answer
the questions to the
right.
Theory of Continental Drift
1. Add the foldable to
pg.131 in your
notebook.
2. Research the answers
from your notes and
record behind the
window pane.
Oceanic vs. Continental
1. Cut out and add the Venn-Diagram to pg.132
in your notebook.
2. Use your notes from pages 113 and 128 to
find at least 3 facts for each section of the
diagram.
Test Results and Corrections
1. Review your test score and mastery level
results.
2. Begin making corrections for ½ credit back.
 Correct answer
 Explanation for new answer
 Cite your source – where you found the answer
3. Corrections are due by Thursday.
Bell Ringer 21 - Wednesday
1. Sit quietly.
2. Copy the homework
in your agenda.
3. Add pgs. 133-134 to
your Table of
Contents.
4. On Pg.127, answer
the questions to the
right.
Adams Family Plate Boundaries
1. Add the foldable to
pg.133 in your
notebook.
2. Behind the flap
write the name of
the boundary.
3. On the other side
write what it
forms/causes and an
example.
Name
Forms…
&
Example
Name
Forms…
&
Example
Name
Causes…
&
Example
Plate Boundaries Chart
1. Add the chart to
pg.134 in your
notebook.
2. Use your notes and
other foldables to
complete the chart.
Bell Ringer 21 - Thursday
1. Sit quietly.
2. Copy the homework
in your agenda.
3. Add pg. 135 to your
Table of Contents.
4. On Pg.127, answer
the questions to the
right.
4
Plate Tectonics Scavenger Hunt
1. This paper will be turned in for a
grade today. Put your name on it.
2. Write the definition from your
assigned starting point.
3. Search for the answer at another
station. Record the word and letter.
4. Your answer sheet will display the
following in sequence for all:
a) Definition
b) Word
c) Letter in box
Plate Boundary Pockets
1. Cut out the pockets and
cards.
2. Glue the pockets to
notebook pg.135
3. Match the cards with
the correct pockets.
Bell Ringer 21 - Friday
1. Sit quietly.
2. Copy the
homework in your
agenda.
3. Add pg. 136 to
your Table of
Contents.
4. On Pg.127, answer
the questions to
the right.
Plate Tectonic Task Cards
1. Get out a half sheet of
paper and put your
name on it.
2. You and your group will
work together to
answer 2 sets of task
card questions (baggie
A and baggie B).
3. You will have 10
minutes with each
baggie.
Continental Drift Interactive
Reading Comprehension
1. Cut out and read the passage with
Notebook
your group.
pg. 136
2. Read and follow the instructions on
your cut-out sheet.
Evidence
Notebook
pg. 137
Continental 1
Drift
2
Pangaea
Progress
3
4
Wegener Facts:
Present
Summary