Vocabulary
There are how many_____________ main layers of the Earth?
What is four?
Proposed the Continental Drift Theory
Who is Alfred Wegener
Earthquakes and Volcanoes are usually located near these.
What is a plate boundary
The Himalayan mountains are the result of a ___________________________ boundary.
What is continental-continental convergent boundary
The thickest layer of the Earth
What is the mantle.
Evidence of matching animal fossils were found from this two separate continents 1._____________________ and 2._____________________
What is Africa and South America
The mid-ocean ridge is an example of a ____________________ boundary and the site of ____________________
What is divergent boundary; sea-floor spreading
Hot material is less ________________ than cool/cold materials
What is dense
Plates float on top of this layer. What is it? _______________________.
What is the asthenosphere?
Evidence of tropical plants were found on this continent
What is Antarctica
Name four of the major plates
What is any of the following North American plate, South American plate, Eurasian Plate, Indoaustralia plate, African plate, Antarctica plate
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
This hypothesis states that youngest rocks of ocean floor are at diverging boundaries, moving outward.
What is seafloor spreading?
Pangaea existed this many millions of years ago
What is around 250 million years ago
This is the dominant mechanism or force that causes the plates to move
What is slab pull
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
It is the hottest layer of the Earth, this layer is solid metal
What is the inner core?
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is thinnest under the ocean and thickest under the continents.
Continental Drift Theory was not accepted because it did not explain what?
What is how the continents moved
The three types of convergent boundaries
Continental-oceanic convergence, oceanic-oceanic convergence, continental-continental convergence
He is the proponent of the sea-floor spreadin theory, he discovered the mid-oceanic ridge.
Who is Harry Hess!