The Continental Drift Hypothesis
That continents are in constant motion.
What is continental drift?
page: 217
The super big continent is called ________.
What is Pangaea?
page:217
The mountain ranges in the middle of the ocean are called _______________
What is mid-ocean ridges?
page:225
When the seafloor spreads, the mantle below melts and forms _______.
What is magma?
page:226
Plate tectonics state that Earths surface is made of rigid slabs of ____, or______, that move with respect to each other.
What is rock and plates?
page:233
Some places have similar rock formations which are called __________.
What is Rock clues?
page:220
Alfred Wegener was the person to discover _______.
What is Pangaea and Continental Drift?
page:217
This is the process by which new oceanic crust forms along a mid-ocean ridge and an older oceanic crust moves away from the ridge.
What is Seafloor Spreading?
page:226
_______ do not move through the solid mantle or the seafloor.
What are Continents?
page:227
____________________ form where two plates collide.
What is convergent plate boundaries?
page:235
This is similar organisms on different parts of earth.
What is fossil clues?
page: 219
The glaciers in some places started to melt more and glaciers formed in places where there as never been a glacial.
What is Climate clues?
page:218
This is a state where compasses and needles will orient themselves to point north.
What is normal polarity?
page:228
Close to the mid-ocean ridge there is almost no _______.
What is sediment?
page:227
the cold and rigid outermost rock layer is called the ___________.
What is lithosphere?
page:234
He observed the similarities of the Continental coastlines now separated by oceans.
What is Alfred wegener?
page:217
what is the mantle?
page: 221
This is when the magnetic field reverses directions.
What is magnetic reversal?
page:228
The layer of sediment becomes thick enough to make the ______ smooth.
What is seafloor?
Page: 227
What is Continental Drift?
page:221
The Caledonian mountain range in northern Europe and the __________ mountain range in eastern North America are similar in age and ____
what is Appalachian?
page:220
This is when the compass orient to the south.
What is reversed polarity?
page:228
The ______ of seafloor spreading provides a way to explain how continents move.
What is Theory?
page: 227