Plate Boundaries
What happens at a convergent boundary?
Plates move toward each other
Who came up with the idea of continental drift?
Alfred Wegener
What causes most earthquakes?
Plate movement
What landform forms at divergent boundaries?
Mid-ocean ridge
What is the outer layer of the Earth called?
Crust
Name the boundary where plates slide past each other.
Transform
What was the name of the supercontinent?
Pangaea
Where do most volcanoes occur?
Plate boundaries
What forms at convergent boundaries with two continental plates?
Mountains
What layer do tectonic plates float on?
Mantle
Which boundary creates new ocean floor?
Divergent
What type of evidence supports continental drift?
Fossils, rocks, puzzle fit
What is the name of the area with many volcanoes around the Pacific Ocean?
Ring of Fire
Name a landform caused by subduction.
Volcano or trench
What’s the name of Earth’s inner core made of?
Iron and nickel
What’s it called when one plate sinks under another?
Subduction
Why was Wegener's theory rejected at first?
No mechanism for how plates moved
What boundary type causes strong earthquakes?
Transform
Which landform forms where two oceanic plates meet?
Island arc
What does the word "tectonic" mean?
To build or related to structure
What forms when an oceanic plate meets a continental plate?
Volcano/trench
What technology helped prove plate movement later on?
Seafloor spreading/sonar)
What scale measures earthquake strength?
Richter scale
What is the deepest part of the ocean called?
Trench
What’s the name of the super-deep boundary where plates slide past?
San Andreas Fault