Types of Plates
What are the two types of Materials in oceanic and continental plates
Sial and Sima
Who "proved everyone wrong"
Alfred Wegner
How many Plate boundaries are there
3
How many total plates are there
52
What is plate tectonics
-Movement of plates
-strong plates separated by weak boundaries
What are the two types and two categories of plates
Major, Minor, Continental and Oceanic
What was the idea proposed by Harry Hess
That a new sea floor was being made at the ridge and spreading outwards
What is the names of the plate boundaries
Divergent, Convergent, Transform
Where is the Eurasian Plate located
How do Scientists think the Plates were made
Pieces of the mantle were pulled back weakened the mantle and over time plates were created
How many major plates are there
7 Major plates
TRUE OR FALSE: At one time it was believed that there was a giant landmass that connected all of the continents
True
What is the Mid-Atlantic Ridge
-10,000 long mountain range on the seafloor
-A divergent boundary
Where is the Juan de Fuca located
West Washington located (Near Canada-Usa border)
Who lead the group of researchers that created a computer version of the earth
David Bercovici
How many minor plates are there
8 Minor plates
when did Alfred Wegner complete his Theory on continental drift
1920
What is a divergent Boundary
Divergent boundaries are along the edges of plate that have been separated
Where is Scotia plate location
Scotia ocean (Antarctica)
What is Sima
Tar like substance
What are oceanic plates made of
Silicon and Magesium
Who was the first person to come up with the idea of plate tectonics
Antoine Snider
What is a convergent boundary
Convergent boundaries are when two plates are pushed together and one slides under the other
Where is the Nazca Plate moving
The Nazca plate is moving eastwards to the SA plate at about 79mm per year
What is the layer under the lithosphere that plates flow on
Asthenosphere