Harry Hess
Who discovered the theroy of plate tectonics?
A. Hess
B. Wegner
C. Monte
Hess
This is a break in the Earth's crust?
Fault
Plate
Sonar
Fault
A wedge is when cold water hits molten material. it makes a lot of energy and when it breaks through the surface, it makes a _____________
Volcano
Ridge
Harry Hess
Volcano
Basalt is _________ dense than continental crust
more
What was the name of the submarine we learned about?
Alvin
Simon
Theodore
Alvin
Where does plate tectonics take place at?
Inner core
Outer core
Crust and upper mantle (lithosphere)
Crust and upper mantle (lithosphere)
How fast to plates move every year?
100-200 miles
10-20 feet
1-12 centimeters
1-12 centimeters
How deep is the Mariana Trench?
100 feet
40,000 miles
36,000 feet, or 7 miles
36,000 feet, or 7 miles
Granite is _____ dense than basalt
Less
Mid ocean ridges have __________ deposits from years of polar shifts
Iron
Fossils
Volcano
Iron
Cracked lithosphere pieces are called...
faults
plates
subduction zones
Plates
What is the pulling force during subduction?
Water
Trenches
Gravity
Gravity
How do scientists track plate movement?
Using rulers
Using their best guesses
Using satellite photos and compare them from year to year
Using satellite photos and compare them from year to year
This fault meets along the Pacific and North American Plates and causes many earthquakes in California.
Hint: GTA
San Andreas fault
Continental crust plates collide. What happens?
It makes a trench
It makes mountains that never stop growing
It subducts into the core
It makes mountains that never stop growing
The theory of plate tectonics states that earth is in slow, constant ________, driven by ________ currents
Motion, Convection
Two plates that slip past each other would be called a ___________ boundary
Convergent
Divergent
Transform
Transform
What maps the sea floor?
Radar
Sonar
Chipmunks
Sonar
2 plates carrying oceanic crust meet. Which one sinks?
The denser one sinks
The lighter one sinks
Nothing sinks and both subduct
The denser one sinks
These type of valleys form along divergent boundaries
Ridge Valleys
Trench Valleys
Rift Valleys
Rift Valleys
Name the 3 types of plate boundaries
Convergent
Divergent
Transform
What is the difference between a convergent and divergent boundary?
Convergent comes together
Divergent pulls apart
There was Pangea. Now there is our world
Explain what role plate tectonics played in having this occur
Plates slowly moved apart over millions of years.
Changed landmass and continents
Most divergent boundaries form along _______
The Ring of Fire
Canada
Mid-Ocean Ridges
Mid-Ocean Ridges
Name 2 landmasses that can be formed by plate movement
volcanoes
mountains
trenches