Vocabulary
The thinnest layer of the Earth.
What is the crust?
There are ______________ main layers of the Earth.
What is four?
He created the Continental Drift Theory.
Who is Alfred Wegener?
Earthquakes and Volcanoes are usually located in relation to these.
What is a plate boundary?
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary?
A number of rigid, but moving, pieces of Earth's surface.
What is 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?
The mid-ocean ridge is an example of a ____________________ boundary.
What is divergent boundary?
Hot air or liquid is less ________________ than cool air or liquid.
What is dense?
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 mantle?
Evidence of tropical plants were found on this continent.
What is Antarctica?
Name four of the major plates.
What is the North American plate, South American plate, Eurasian Plate, Indo-Australian plate, African plate, Antarctica plate?
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes?
The two innermost layers of Earth.
What is the core?
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?
This is what causes the plates to move.
What is convection cycles in the mantle?
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary?
Although 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 this.
What is how the continents moved?
The two types of convergent boundaries.
What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)?
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?