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Earth (layers, etc)

QuestionAnswer
This is the thinnest, least dense layer of the earth crust
This is the middle, thickest layer of the Earth mantle
This is the inside layer of the Earth core
The inner core is a solid ball of nickel and iron
The outer core is mostly nickel and iron in what form? liquid
What causes Earth's plates to move slightly? convection currents
When two of Earth's tectonic plates come together it forms what type of boundary? convergent
When two tectonic plates move away from each other, it forms what type of boundary? divergent
When two tectonic plates slide horizontally past each other they form what type of boundary? transform
When an oceanic plate sinks below a continental plate it is called subduction
Another word for weak spots in the plates (where earthquakes form) faults
What is the study of earthquakes called? seismology
underwater mountain chains mid-ocean ridges
The name of the super continent when all of the plates were connected Pangaea
Which earthquake waves are the most destructive? surface waves
which are the first (primary) waves of an earthquake? P waves
What are the second waves to arrive in an earthquake? S waves
The theory that the continents were once connected and slowly drifted to their current location. continental drift
Where do most earthquakes and volcanoes occur? plate boundaries
magma that has erupted from a volcano is called what? lava
what type of eruption produces lava? nonexplosive
what is material that has been shot out of a volcano and hardened in the air? pyroclastic material
What type of eruption produces pyroclastic material? explosive
the pieces that make up the Earth's crust plates
cracks in the Earth's surface faults
This type of crust is more dense than continental crust. oceanic
When one plate is pushed down under another plate subduction
Created by: kimhanson
 

 



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