WorksheetsContinental Drift and Sea-floor Spreading
Total questions: 10
Worksheet time: 8mins
Who proposed the theory of continental drift?
Harry Hess
Alfred Wegener
Chasity Clary
Principal O'Neal
The theory of continental drift states...
the continents will eventually drift off the side of Earth
the continents drifted onto Earth from other planets
new crust is formed at the mid-ocean ridge
the continents were once one big landmass and slowly moved to where they are today
What is the name of the big landmass that existed before the continents separated?
Gondwana
Laurasia
Pangea
America
Which of the following is evidence of continental drift? Check all that apply.
continents seem to fit together like a puzzle
common fossils across the continents
the sonar map of the seafloor
similar rock types and mountain ranges across the continents
What is the longest mountain range in the world?
Mid-Atlantic Ridge
Himalayas
Rocky Mountains
Appalachian Mountains
Where is the longest mountain range in the world located?
in Africa
in Europe
on the ocean floor
on the moon
The mid-ocean ridge is at what type of boundary?
convergent
divergent
transform
transverse
What is created at the mid-ocean ridge?
a new continent is being created there
a new ocean is being formed there
new islands are being created there
new sea floor is created when the plates pull apart and magma bubbles up from the mantle and cools.
What happens to the old sea floor?
it is recycled back into the mantle at subduction zones.
Nothing happens to the old crust. The Earth is actually getting larger and larger due to the contstant formation of new crust.
it dissolves into the ocean
True or False: Newer crust can be found closer to the Mid-Atlantic Ridge and older crust can be found further from the Mid-Atlantic Ridge.
TRUE
FALSE
