Earths Layers
what are the four layers that make up Earth?
CRUST, MANTLE, OUTER CORE, INNER CORE
How many types of heat transfer did we talk about and what are they?
1. RADIATION
2. CONDUCTION
3. CONVECTION
Who theorized Continental Drift in 1912?
Alfred Wegener
What is a tectonic plate?
A large slab consistent of the lithosphere that float on top of the mantle
What happens when plates interact?
Faults or breaks in the Earths crust
What state of matter is the outer core?
LIQUID
which of the types of heat transfer involved DIRECT CONTACT?
CONDUCTION
Who theorized Sea Floor Spread in 1962?
Harry Hammond Hess
what are plate boundaries
where tectonic plates / edges of plates meet
what results from a divergent boundary?
RIFT VALLEYS
What is the location of the mantle?
IN BETWEEN THE CRUST AND OUTER CORE
The convection currents in the mantle move similarly to a ...?
CONVEYOR BELT
What is the theory of continental drift?
There was once a supercontinent (Pangea) that drifted and spread apart over millions of years
what are the three types of boundaries?
1. Convergent
2. Divergent
3. Transform
what results from a transform boundary?
EARTHQUAKES/ TSUNAMIS
What is continental crust primarily made up of?
GRANITE
What type of heat transfer involved cycling of temperature / density through a fluid for heat transfer to occur?
CONVECTION
What is a piece of evidence supporting continental drift theory?
LANDMASSES FITTING LIKE A PUZZLE, FOSSIL MATCHES, CLIMATE CUES, MOUNTAIN RANGES MATCHING
Who established plate tectonic theory in 1965?
John Tuzo Wilson
True or False: All plate boundaries result in volcanoes / mountains?
FALSE only CONVERGENT
What metals are the other three layers primarily made up of?
Iron and Nickle
Convection in the mantle and subduction causes what to happen?
Oceanic crust (more dense) to sink beneath the continental crust (less dense) which this cycle drives the movement of tectonic plates as old crust is destroyed and new crust is created
What is the theory of Seafloor Spread AND a piece of evidence to support it?
the theory that the seafloor spreads on either side of a mid ocean ridge as new crust is added or destroyed
-molten material (basalt pillows)
-magnetic stripes (magnetic field reversals)
-Drilling samples of Earths History
Which type of boundary is this: when two plates pull away from each other in opposite directions
DIVERGENT BOUNDARY
what results from a convergent boundary? 2 parts
1. continental and continental
2. oceanic and oceanic OR oceanic and continental
MOUNTAINS (Continental and continental)
OR
TRENCHES (oceanic and continental)
VOLCANOES (oceanic and oceanic)