What is Plate Tectonics
What are the 4 main layers of the Earth?
Crust
Mantle
Outer core
Inner core
Earthquakes and volcanoes always occur randomly. True or false?
False
2 Types of crust
continental, oceanic
Outer core
The previous supercontinent was named
Pangea
Part of the Earth made up of solid iron and nickel
Inner core
Where is new material and old material relative to a mid-ocean ridge?
New material = closer
Old material = farther
What feature will a C-C divergent boundary create?
Rift valley
Ridge push
The 2 landmasses after the supercontinent were
Gondwana and Laurasia
Who came up with continental drift?
Wegener
Where do most earthquakes and volcanoes occur?
Plate boundaries
older, colder one
Hot materials __________ because they are ___________. Cold materials ___________ because they are ___________.
rise, less dense
sink, more dense
The Himalayas involves these 2 landsmasses
India, Asia
What are the 3 layers of the mantle called, in order from top to bottom?
Lithosphere
Asthenosphere
Mesosphere
What shows Earth's switched poles throughout time?
Materials on the ocean floor
What features an O-O convergent boundary will create?
volcanic islands, trench
Mantle convection occurs in this layer of the mantle causes plates to move
asthenosphere
What is a reason for why mantle convection patterns change
change in mineral composition that changes the temperature patterns
What are 4 observations used to support continental drift?
Shapes of continents
fossils
rocks
climate change
What geological feature is associated with magnetic material being deposited with the orientation of the poles?
Mid-ocean ridge
Is it possible to have plate tectonics occur with only oceanic plates and never have land appear? Explain your answer.
No, as a plate subducts, it will create islands which will move and collide with other materials, eventually create land
Describe slab pull
the subducting plate goes into the mantle and continues to pull the rest of the plate down with it
What are the 4 contributors to continental growth?
Igneous rocks, river sediment, deep-sea sediment, terranes