Harry Hess
The equipment Hess used to collect data.
What is sounding gear/sonar?
The landforms Tharp famously found by mapping.
What are Mid-ocean ridges and rift valleys?
The name of the theory Wegener came up with.
What is continental drift?
A location where two plates are pulling away from each other.
What is a divergent boundary?
The theory the Hess came up with during his work.
What is Seafloor spreading?
The two types of data Tharp used to do her research.
What is earthquake epicenter data and sounding data?
The name of the landmass Wegener discussed.
What is Pangea?
A location where two plates are moving towards each other.
What is a convergent boundary?
Seafloor spreading states:
That new crust is being created at mid-ocean ridges and recycled at subduction zones.
Marie Tharp was this in addition to being a geologist.
What is an oceanographer/cartographer?
Why did no one believe Wegener at the time?
He had no evidence for how the continents were actually moving.
A location where plates are moving past each other.
What is a transform boundary?
How did Hess contribute to the theory of Plate Tectonics?
By figuring out exactly how the plates were moving.
How did Tharp contribute to the theory of Plate Tectonics?
By discovering that plates were in fact moving.
How did Wegener contribute to the theory of Plate Tectonics?
By coming up with the initial idea. / He saw that continents fit together and started to think about how they could have been connected.
This occurs at convergent plate boundaries when one plate moves under another.
What is subduction?
This is created at divergent boundaries when plates pull away from each other.
What is rifting/Ocean ridges?