Show:
boundaries
plates
the theory of continental drift
Types of crust
100
a ...... boundary is a plate where two plates slip past each other
transform
100
earth is broken into pieces called....
plates
100
What is a scientific theory
its a well-tested concept that explains a wide range of observations
100
what rock does the continental crust mainly consist of?
basalt
200
what boundary forms a mountain
convergent
200
True or false the super continent is called antartica
false
200
who first proposed the the theory of continental drift?
Alfred wegener
200
true or false the lithosphere includes all of the core ans part of the mantle
False
300
is a subduction zone?
when one plate goes under the other and sometimes forms earthquakes and tsunamiswhat
300
where are the plates located
in the lithospere
300
fossils found on islands of different continents are evidence of ........
continental drift
300
Is an oceanic more dense than a continental plate?
YES
400
what boundary forms rift valleys
divergent
400
what plate is mostly water?
What is pacific plate
400
what force caused the movement of the continents from one super-continent to their present posistions?
convection currents in the mantle
400
when an oceanic plate and a continental collide which plate slides under ?
oceanic plate
500
what boundary forms volcanoes
convergent
500
what are the 7 major plates?
eurasian,north america,south america,pacific,nazca,australia,antartica
500
why did scientists reject Alfred wegener's theory
because he couldnt describe the climate of pangea
500
when an oceanic plate and a continental collide and the oceanic slides under where does it go
back to the mantle in a convection current