Continental Drift
Seafloor Spreading
Plate Boundaries
Boundary Effects
Plate Map Challenge
200
This scientist proposed that Earth's continents were once joined together.
Who is Alfred Wegener?
200
This scientist developed the theory of seafloor spreading.
Who is Harry Hess?
200
At this boundary, two plates move away from each other.
What is a divergent boundary?
200
This natural disaster commonly occurs along tranform boundaries.
What are earthquakes?
200
This tectonic plate is located between the Pacific Plate and the South American Plate on the map?
What is the Nazca Plate?
400
Wegener noticed that these two continents appear to fit together like puzzle pieces.
What are South America and Africa?
400
This hot material from the mantle rises and helps form new ocean floor.
What is magma?
400
At this boundary, two plates slide past each other.
What is a transform boundary?
400
Mid-ocean mountain ranges form at this type of boundary.
What is a divergent boundary?
400
This type of boundary separates the South American Plate and African Plate?
What is divergent?
600
Wegener called the ancient supercontinent by this name.
What is Pangaea?
600
Seafloor spreading occurs along these underwater mountain ranges.
What are mid-ocean ridges?
600
At this boundary, two plates move toward each other.
What is a convergent boundary?
600
These valleys can form where continental crust pulls apart at a divergent boundary.
What are rift valleys?
600
Name two plates on the map that form a convergent boundary.
What are the Nazca plate and South American Plate? or What are the Indo-Australian and Eurasian plate?
800
Wegener found matching remains of plants and animals on continents that are now far apart. What type of evidence is this?
What is fossil evidence?
800
Ocean crust closest to a mid-ocean ridge is generally this age compared with crust farther away.
What is younger?
800
At this boundary, no new crust is formed and no old crust is destroyed.
What is a transform boundary?
800
Mountain ranges, volcanoes, and deep earthquakes are associated with this boundary.
What is a convergent boundary?
800
This type of boundary forms between the Antarctic Plate and Indo-Australian Plate?
What is divergent?
1200
Despite his evidence, many scientists rejected Wegener's theory for this major reason.
What is he could not explain HOW the continents moved?
1200
Where you find the oldest ocean crust: close to or far from a mid-ocean ridge?
What is far from the mid-ocean ridge?
1200
This theory combines the ideas of continental drift and seafloor spreading.
What is the theory of plate tectonics?
1200
This process occurs when old crust is pulled downward and remelted.
What is subduction?
1200
This type of boundary is between the Eurasian Plate and Pacific Plate?
What is convergent?