Tectonic Plates
What are tectonic plates?
A massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
What are the different types of boundaries?
Convergent, Transform, Divergent
What are mid-ocean ridges caused by?
Volcanic Eruptions
True or False
Continetal drift was a theory
True
Earthquakes and Volcanos
True or False
Do boundaries move?
Yes!
What boundaries make mid-ocean ridges?
Divergent
Who had the idea of Continetal drift?
Alfred Wegener
How are they made?
Earth's crust is attached to the uppermost part of the mantle, together forming the lithosphere. The lithosphere is broken up into huge section called plates that are constantly in motion.
How would you describe the motion of plates in a divergent boundary?
Two plates move away from each other.
What stress causes mid-ocean ridges?
Tensional (stretching) stresses
What was the earth once called before the contents separated?
Pangea
What are the moving plates on the Earth's crust called?
Tectonic Plates
What is not likely to happen at a divergent boundary?
Formation of large mountains
What is most likely to form at a mid-ocean ridge?
Volcanic activity
What are clues to continental drift?
Fitting of continents, matching rock layers, fossil distribution, paleoclimate indicators, and magnetic anomalies
What are Tectonic Plates made of?
The oceanic lithosphere and the thicker continental lithosphere
What kind of boundary creates mid ocean ridges?
Divergent
What type of crust is at a mid-ocean ridge?
Basaltic, oceanic crust
What caused the continental drift?
The spreading of the seafloor