Wegener
This is the name of Wegener's theory about how the continents used to be one giant landmass.
The theory of plate tectonics claims the earth's crust is made of rigid pieces known as this.
Plates
Underwater mountain ranges are known by this name.
High seismic activity at converging and transforming plate boundaries causes this natural disaster.
Mariana Trench
This type of evidence showed the same plants and animals on different landmasses that are not close to each other today.
Fossil Evidence
This type of boundary occurs when two tectonic plates collide creating mountains and ocean ridges.
Convergent boundary.
This is the name for deep underwater troughs on the sea floor.
Ocean trenches.
Underwater earthquakes can cause a large displacement of water forming gigantic waves that flood shorelines and cause massive destruction called this.
Tsunamis
This chain of islands in the United States was formed by hot spot volcanoes in the middle of the Pacific Plate.
Hawaii
The word Pangaea comes from the two Ancient Greek words meaning this in English.
gaia- Earth
This type of boundary is when two plates move horizontally against one another.
Transform boundary.
This process of using sound to explore the ocean floor is how scientists discovered what the ocean floor looks like deep underwater where there is no light to see.
Sonar.
This is the name of a curved line of volcanoes that form at plate boundaries.
A volcanic arc.
The San Andreas fault is the second biggest fault in the continental United States and is responsible for the high seismic activity in this US state.
Scientists during Wegner's time doubted his hypothesis because he was unable to explain why it happened, and Wegener was unable to provide proof for this reason.
He froze to death on an expedition.
This process sometimes happens at convergent boundary where a denser plate is pushed underneath a less dense plate usually forming a mountain range.
Subduction.
This is the name of an underwater mountain that breaks through the surface of the water.
An Island
This is the name for volcanoes that pop up in the middle of tectonic plates.
Hot spot volcanoes.
The Andes mountains in South America are an example of a mountain range that has formed due to this process.
Subduction
Glacial evidence supporting Wegener's theory can be explained by this finding.
Identical glacial striations or "scratches" on multiple continents with identical sediment deposits.
This is what we call a break in the earth's crust which can form mountains and are usually a source of high seismic activity.
A fault.
This is the term describing the process that is responsible for the formation of the rifts, which happens at divergent plate boundaries.
Seafloor spreading.
This is the name for the mountains formed by underwater volcanoes that do not break the surface.
Seamonts.
This is the name of the the underwater mountain range that has formed at the divergence of he North American and Eurasian Plates, and the South American and African Plates in the middle of the Atlantic Ocean.
The Mid-Atlantic Ridge