Earth's Layers
A ball of hot, solid metals at the center of the Earth.
What is Inner Core?
He proposed a hypothesis known as continental drift.
Who is Alfred Wegener?
The three types of boundaries.
What are divergent, convergent, and transform boundaries?
When two plates collide and push together.
What are convergent boundaries?
The layer between the inner core and the mantle.
What is the outer core?
The thickest layer of Earth that is made of soft, hot rock.
What is the mantle?
The three main points of evidence for Wegener's hypothesis.
What are fossils, climate, and geology?
Another name for divergent boundaries.
What are spreading centers?
What are continental-continental, oceanic-oceanic, and oceanic-continental boundaries?
The large moving pieces that carry both continental and oceanic crust.
What are tectonic plates?
The surface of the Earth that is home to all life on Earth.
What is the Crust?
The name of the giant supercontinent.
What is Pangaea?
A wide gap between mid-ocean ridges.
What is a rift valley?
The colliding plates that formed the Himalayas.
What are the Indian and European plates?
The two motions that help move the huge plates.
What are slab pull and ridge push?
Formed by Earth's crust and the very top of the mantle.
What is the Lithosphere?
What are mid-ocean ridges?
They line up like stripes in the rock.
What are records of magnetic reversals?
To sink.
What is subduction?
When one oceanic plate is older and sinks below a younger oceanic plate.
What is oceanic-oceanic subduction?
Soft rock layer in the upper mantle, directly below the lithosphere.
A motion that transfers heat energy in a material.
What is a convection current?
They cause volcanic activity at the surface.
What are hot spots?
Chains of volcanic islands.
What are Island Arcs?
When two tectonic plates scrape past each other.
What is a transform boundary?