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
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 and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading
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
All the water of the Earth is known as
What is the hydrosphere
Evidence of tropical plants were found on this continent
What is Antarctica
This occurs when plates move away from each other
What is divergent boundary
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
The mantle is interior to the crust. What does the term interior mean?
What is inside
The hottest layer of Earth
What is the inner core
Pangaea existed this many millions of years ago
What is around 250 million years ago
This is the mechanism (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)
Name of the fossil evidence found on continents that help support theory of continental drift?
What is Mesosaurus