The longest chain of mountains in the world that extends into all of Earth's oceans
What is the mid-ocean ridge?
100
Rigid slabs of lithosphere that move slowly over the asthenosphere
What is tectonic plates
100
A thoroughly tested and widely accepted scientific idea.
What is theory
100
He first proposed the idea of continental drift
Who is Alfred Wegener
100
lava
What is Magma that reaches Earth's surface
200
A device that bounces sound waves off underwater objects and enables scientists to map the ocean floor.
What is sonar
200
Scientists think that this is the reason tectonic plates move.
What is convection currents in the mantle
200
Molten material, gases and water from the mantle.
What is magma
200
the name of a supercontinent that existed about 225 million years ago
What is Pangaea
200
of the area that has the most earthquakes and volcanic eruptions on Earth.
What is the Ring of FireName
300
subductionWhat Process by which old, dense oceanic crust sinks back into the mantle
subduction
300
a boundary when two plates collide
What is a convergent boundary
300
Continental plates diverging in Africa have created this feature
What is the East African Rift Valley
300
Three types of evidence used by Wegener to support his idea of continental drift.
What is evidence from landforms, fossils and climate
300
Name of a future supercontinent predicted to form in about 250 million years.
What is Pangaea Ultima
400
A underwater canyon created by subducting oceanic crust.
what is a deep-ocean trench
400
Two plates carrying continents are colliding to form the Himalayas at this type of boundary.
what is convergent
400
Oceanic plates converging in the Pacific have created the deepest place on Earth.
What is Mariana Trench
400
Name of the fernlike plant fossil found in Africa, South America, Australia, India and Antarctica that was evidence of continental drift.
What is Glossopteris
400
The word "tekton" means this
What is "to build"?
500
Evidence that oceanfloor rock lies in a pattern of "stripes" that are the same on both sides of a mid-ocean ridge.
What is a record of magnetic field reversals
500
The North American Plate and the Juan de Fuca Plate share this type of boundary.
What is transform
500
A break in Earth's crust where rock movement has occured, sometimes resulting in earthquakes.
What is a fault
500
Name of the book Wegener published in 1915
What is "The Origin of Continents and Oceans"
500
The March 11, 2011 earthquake off the coast of Japan was the result thrust faulting along the subduction zone boundary of the Okhotsk Plate and another plate.