Evidence
Markings found on rocks on continents like Africa and Australia provide evidence that at one time they were further away from the equator.
What are glacial grooves?
This igneous rock makes up the vast majority of the oceanic crust
What is Basalt?
This device was first used to help map out the oceanfloor
What is a echosounder?
As plates interact with each other stress builds in rocks eventually causing them to break and release energy. This happens when plates slide past each other or toward each other
What are Earthquakes?
What is the continental drift hypothesis?
The composition and construction of the Appalachian mountains have similarities to this mountain range in Europe which suggest that they were formed at the same time
What are the Caledonian Mountains?
This is the how many major tectonic plates there are
What is 7?
What is Polarity?
This is the sinking of a denser plate below a more buoyant plate at a convergent plate boundary
What is subduction?
This is the naturally preserved remains, imprints, or traces of organisms that lived long ago
What is a fossil?
The Glossopteris fossil was thought to live in this type of wetland environment
What is a swamp?
New Crust forms at this type of plate boundary
What is a divergent plate boundary?
This is process of the Earth's magnetic poles flipping locations
What is magnetic Reversal?
This is the cold, rigid outermost rock layer of Earth
What is the lithosphere?
Though he is most known for his work in meteorology and hypothesis in geology Alfred Wegner studied this science in college
What is Astronomy?
This was the leading theory during Alfred Wegner's life to explain why fossils of the same species were found on continents that are not currently touching.
Mapping the ocean floor led to the discovery of these two landforms that make up the ocean floor. (Be specific with their names)
What are midocean Ridges and the Abyssal Plain?
Due to the location of its magnetic poles the Earth is sometimes compared to this type of magnet
What is a bar magnet?
This means capable of being molded or changing shape
What is plastic?
These are weapons of war are the reason technology was invented that allowed scientists to map the seafloor. (be specific with your answer)
What are German U-boats
Even though he had evidence to support his theory these were the two main issues scientists had with Alfred Wegner's continental drift hypothesis.
What is Wegner could not measure how fast/far continents moved and Wegner could not explain how continents moved
This was the original name Alfred Wegner gave the supercontinent that is now known as Pangea
What is Urkontinent?
Scientists were able to study the _______________ of basalt which proved that new land was being created through the process of seafloor spreading
Magnetic signature
This is the circulation of material caused by differences in temperature and density
Convection
There are the two types of landforms you would expect to find at a convergent plate boundary with two oceanic plates
What is island arc volcanoes and a deep ocean trench?