Random
What is the name of a supercontinent?
Pangea
Which layer is the coldest?
Crust
True or False: The Earth is one solid slab of rock
False
Sea floor spreading occurs here.
Mid-Ocean Ridge
Where does subduction occur?
Deep - Ocean Trenches
How are oceanic and continental crusts different?
The oceanic crust is heavier than the continental crust
Which layer is made of liquid metal?
Outer Core
What is a plate?
A broken piece of Earth's crust
True or False, seafloor spreading "recycles" the crust
False
What two types of crust are involved in subduction?
Ocean Crust and Continental Crust
In which layer of the Earth does subduction occur?
1. Asthenosphere
What is the temperature at the boundary between the inner core and outer core?
~ 6200 Celsius
What are the three geological processes that occur at plate boundaries?
Volcanoes, Earthquakes, and Mountians
Where is the ocean floor the oldest?
By the deep-ocean trenches before subduction.
What is subduction?
When denser plate slides under an less dense plate.
What are the 7 major plates?
1. Pacific 2. African 3. Antarctic 4. North American 5. South American 6. Eurasian 7. Indian- Australian
What is the pressure between the stiffer mantle and outer core + what is the depth?
1.5 million atm + ~ 2800
Who proposed the theory of continental drift?
Alfred Wegener
When earth's plates are pushed apart by magma deep in the ocean floor.
What is sea-floor spreading
Give one example of how subduction is different than sea-floor spreading
1) Seafloor spreading adds crust, subduction gets rid of it 2) Seafloor spreading happens at mid-ocean ridges, subduction occurs at deep-floor trenches.
Name 3 pieces of evidence that support seafloor spreading
1. Pillow like rocks on the ocean floor 2. Rock samples that analyze the age of the rock
Without using your ESRT, from outside to inside, name all layers of the Earth including the different layers of the mantle
Crust, rigid mantle, Asthenosphere, Lower mantle, Outer Core, Inner Core
What are the three forms of evidence that support continental drift?
Fossils, Land Features, glaciers, fit of continents
Sonar was used to discover these structures
What are mid-ocean ridges?
The pacific ocean is _____________ while the atlantic ocean is _____________ .
The pacific ocean is shrinking while the atlantic ocean is growing .