Vocabulary
The thinnest layer of the Earth
What is the crust?
There are ______________ main layers of the Earth.
What is four?
Created the Continental Drift Theory
Who is Alfred Wegener?
Earthquakes and Volcanoes are usually located in relation to these.
What is a plate boundary?
He was a Dutch mapmaker who noted the fit between the coastlines of South America and Africa more than 400 years ago.
Who is Ortelius?
A number of rigid, but moving, pieces of Earth's surface
What are tectonic plates?
The thickest layer of the Earth
What is the mantle?
Evidence of matching animal fossils from two separate continents _____________________ and _____________________
What is Africa and South America?
This constant motion causes the plates to move.
What are convection currents?
He was a German meteorologist who proposed the theory of continental drift.
Who is Alfred Wegener?
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory?
Plates float on top of the _______________________.
What is the asthenosphere?
These provided support for the continental drift theory (in other words they were found in different areas).
What are fossil clues?
Two continental plates colliding will create this.
What are mountains?
The research ship that began gathering information about the rocks on the seafloor in 1968.
What is the Glomar Challenger?
States that youngest rocks of ocean floor are at divergent boundaries, moving outward
What is seafloor spreading?
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere?
Pangaea existed this many millions of years ago.
What is around 250 million years ago?
Transform boundaries usually cause these.
What are earthquakes?
A transform boundary that occurs between the Pacific Plate sliding past the North American Plate.
What is the San Andreas Fault?
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core?
Name of the supercontinent.
What is Pangaea?
Continental Drift Theory was not accepted because it did not explain these three ideas.
What is: how, when, and why the continents moved?
Plates move about 1 cm to about ____ cm a year.
What is 2.5 cm?
This person used sonar to map the bottom of the ocean and discovered the mid-ocean ridge in the Atlantic Ocean.
Who is Harry Hess?