Evidence of Seafloor Spreading
Ancient remnants that Earth's magnetic field has reversed numerous times during our history.
Paleomagnetism
Name the 3 types of plate boundaries
Divergent
Convergent
Transform (Strike-slip)
Created by divergent boundary in the ocean
Oceanic ridges
What technology did Harry Hess use to map the Ocean's floor?
Sonar
The three layers of the Earth's interior
Crust
Mantle
Core
The youngest crust is near divergent boundaries and the oldest oceanic crust is farthest away from the boundary
Age of Seafloor
A boundary where crust separates and pulls apart
Divergent Boundaries
Which type of boundaries create most mountains?
Convergent Continent-Continent
Before Harry Hess mapped the ocean's floor, what did people believe the seafloor look like?
Flat
Which mountain can you fit inside the Marianna Trench?
Mount Evert
Earthquakes are located along or near plate boundaries
World Seismicity
A boundary where plates slide past one another
Transform Boundaries
Landform created on land when divergent occurs on continental crust.
Rift
Longest mountain range in the world; over 40,000 miles long
Mid-Atlantic Ocean Ridge
Person who coined the phrase "Gondwanaland" as a supercontinent
Seuss
Volcanic activity occurs along or near plate boundaries, especially subduction zones
Volcanism
A boundary where plates collide
Convergent Boundaries
Two landforms created at convergent subduction zones
Trenches and Volcanoes
Which type of boundary creates the most earthquakes in the world?
Convergent Boundaries
List 4 types of evidence that Wegener used to prove the Continental Drift Theory
Fossils
Mountain Ranges
Glacial Grooves
Geographic Fit (puzzle)
Hottest places on Earth are located along divergent plate boundaries
Heat Flow
Types of Convergent Boundaries
Ocean - Ocean
Continent - Continent
Continent - Ocean
Created in a subduction zone; some of the deepest places in the ocean
Trenches
Theory which states that tectonic plates continually move across the Earth due to convection currents
Plate Tectonic Theory
Reason most scientists did not accept the Continental Drift hypothesis
No evidence of how the continents could move