Continental Drift and Sea Floor Spreading
Plate Boundaries
Plate Boundaries 2
Plate Boundaries 3
Misc.
100
What is the name of the last supercontinent that formed?
Pangaea
100
Diverging
100
What is created when two oceanic crusts diverge?
a mid-ocean ridge (mountains under the ocean)
100
Name the three types plate boundaries.
Convergent, divergent, transform
100
Name 2 pieces of evidence for Continental Drift.
- Glaciation
- Rock layers/ Mountain ranges
- Matching fossils
- Continental puzzle
200
What is the Theory of Continental Drift?
The theory that suggests that the continents were once joined together in a single landmass and have since drifted apart.
200
What type of boundary does this diagram represent:
Convergent
200
What is created when two continental crusts diverge?
a rift valley
200
What is created when two oceanic plates converge with each other?
Trenches or volcanic island arcs
200
Why was the idea of continental drift unaccepted at first?
Wegener could not prove how the plates were moving.
300
Describe Sea-Floor Spreading?
At mid-ocean ridges, magma rises up and pushes the sea floor apart. This adds new crust to the ocean floor and older strips of rock are moved outward from the ridge.
300
What boundary does this diagram represent?
Transform
300
What is an event that occurs at transform boundaries?
earthquakes
300
Why does ocean crust go below continental crust?
because its more dense
300
What is a real world example of a feature that a divergent plate boundary created?
Great Rift Valley; Mid-Atlantic Ridge
400
What scientist developed the Theory of Continental Drift?
Alfred Wegener
400
What type of boundary does this diagram represent?
Divergent
400
What is created when two continental plates converge with each other?
Mountain ranges
400
What type of boundary does this diagram represent?
Convergent Plate Boundary Subduction (Ocean-Ocean)
400
What is a real world example of a feature that a convergent plate boundary created?
Folded Mountains Himalayas
500
What are two pieces of evidence for sea-floor spreading?
Pillow rocks, paleomagnetism, or drilling samples
500
When one plate slides below another what type of zone is created?
Subduction Zone
500
What is created when a oceanic plate subducts under a continental plate?
volcanoes
500
What type of feature would the following boundary produce? 
Volcanoes
500
What is a real world example of a feature that a transform plate boundary created?
San Andreas Fault