Chapter%20Resources

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Chapter Resources
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resource.
glencoe.com
Image Bank
Foldables
Video Clips and Animations
Chapter Summary
Chapter Review Questions
Standardized Test Practice
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glencoe.com
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Image Bank
Evidence for Continental Drift
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Image Bank
Pangaea
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Image Bank
Fossil Clues
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Image Bank
Appalachian Mountains
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Image Bank
How could continents drift?
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Sonar and Ship
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Image Bank
Seafloor
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Image Bank
Giant Tube Worms in a Hot Water Vent
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Image Bank
Magnetic Field
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Image Bank
Composition of Earths Plates
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Image Bank
Map of Moving Plates
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Earthquake Damage
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Where Plates Slide Past Each Other
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Moving Mantle Material
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Normal Faults and Rift Valleys
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Mountains and Volcanoes
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Testing for Plate Tectonics
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Foldables
Plate Tectonics
Make the following Foldable to help identify what
you already know, and what you learned about
plate tectonics.
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Foldables
Fold a vertical sheet of paper from side to side.
Make the front edge about 1.25 cm shorter than
the back edge.
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Foldables
Turn lengthwise and fold into thirds.
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Foldables
Unfold and cut only the layer along both folds to
make three tabs.
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Foldables
Label each tab.
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Foldables
Identify Questions
Before you read the chapter, write what you
already know about plate tectonics under the left
tab of your Foldable, and write questions about
what youd like to know under the center tab.
After you read the chapter, list what you learned
under the right tab.
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Video Clips
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Video Clips
Click image to view movie
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Reviewing Main Ideas
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Continental Drift

• Alfred Wegener suggested that the continents were
  joined together at some point in the past in a
  large landmass he called Pangaea. Wegener
  proposed that continents have moved slowly, over
  millions of years, to their current locations.

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Reviewing Main Ideas
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Continental Drift

• The puzzlelike fit of the continents, fossils,
  climatic evidence, and similar rock structures
  support Wegeners idea of continental drift.
  However, Wegener could not explain what process
  could cause the movement of the landmasses.

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Reviewing Main Ideas
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Seafloor Spreading

• Detailed mapping of the ocean floor in the 1950s
  showed underwater mountains and rift valleys.

• In the 1960s, Harry Hess suggested seafloor
  spreading as an explanation for the formation of
  mid-ocean ridges.

• The theory of seafloor spreading is supported by
  magnetic evidence in rocks and by the ages of
  rocks on the ocean floor.

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Reviewing Main Ideas
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Theory of Plate Tectonics

• In the 1960s, scientists combined the ideas of
  continental drift and seafloor spreading to
  develop the theory of plate tectonics. The
  theory states that the surface of Earth is broken
  into sections called plates that move around on
  the asthenosphere.

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Reviewing Main Ideas
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Theory of Plate Tectonics

• Currents in Earths mantle called convection
  currents transfer heat in Earths interior. It
  is thought that this transfer of heat energy
  moves plates.

• Earth is a dynamic planet. As the plates move,
  they interact, resulting in many of the features
  of Earths surface.

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Chapter Review
Question 1
How does the presence of fossils provide support
for the hypothesis of continental drift?
PS 2.2d
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Chapter Review
Answer
Because fossils of particular species are found
on different continents today, it seems more
likely that the land areas were once connected
and that the organisms traveled great distances
and crossed oceans.
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Chapter Review
Question 2
Which of the following are found at mid-ocean
ridges?
A. compressions B. convergences C. oldest
rocks D. youngest rocks
PS 2.2h
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Chapter Review
Answer
The answer is D. Molten material is forced upward
at the ridges, flows sideways and cools, forming
new rocks.
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Chapter Review
Question 3
What is the theory that combines continental
drift and seafloor spreading?
PS 2.2e
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Chapter Review
Answer
The theory of plate tectonics, which states that
Earths crust and part of the mantle are broken
into sections and move on a layer of the mantle,
explains how the continents and seafloor could be
moving.
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Chapter Review
Question 4
If plates are moving in opposite directions or
the same direction at different rates, what type
of boundary is formed?
A. convergent B. divergent C. subduction D.
transform
PS 2.2f
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Chapter Review
Answer
The answer is D. At transform boundaries, plates
move in opposite directions or in the same
direction at different rates.
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Chapter Review
Question 5
What is thought to be the driving force of plate
tectonics?
PS 2.2a
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Chapter Review
Answer
Scientists now think that convection currents in
Earths mantle cause the plates to move.
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Standardized Test Practice
Question 1
What process is illustrated by the diagram?
PS 2.2f
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Standardized Test Practice
A. magnetic field reversal B. plate
convergence C. seafloor spreading D. subduction
PS 2.2f
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Standardized Test Practice
Answer
The answer is C. As the seafloor spreads apart at
a mid-ocean ridge, new seafloor is created.
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Standardized Test Practice
Question 2
What do the magnetic field reversals along
mid-ocean ridges show?
PS 2.2h
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Standardized Test Practice
A. An earthquake is imminent. B. Magnetite levels
are higher than normal. C. New rock is being
formed at the ridge. D. The asthenosphere is a
plasticlike layer.
PS 2.2h
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Standardized Test Practice
Answer
The answer is C. Whenever Earths magnetic field
reverses, newly forming iron minerals record the
magnetic reversal.
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Standardized Test Practice
Question 3
Which type of plate boundary is shown in this
diagram?
A. convergent B. divergent C. reverse D. transform
PS 2.2f
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Standardized Test Practice
Answer
The answer is D. Transform boundaries occur where
two plates slide past one another.
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Standardized Test Practice
Question 4
What is represented by A?
PS 2.2d
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Standardized Test Practice
A. asthenosphere B. continental convection C.
Pangaea D. present day Earth
PS 2.2d
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Standardized Test Practice
Answer
The answer is C. This position indicates where
the continents would have been 250 million years
ago, before they separated.
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Standardized Test Practice
Question 5
Between which two plates is there a transform
boundary?
PS 2.2f
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Standardized Test Practice
A. African and South American B. Antarctic and
Pacific C. North American and Eurasian D. Nazca
and Pacific
PS 2.2f
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Standardized Test Practice
Answer
The answer is B. Transform boundaries occur where
two plates slide past one another
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End of Chapter Resources File