Vocabulary
Earthquakes and Volcanoes are usually located in these specific areas on Earth's surface
What is a plate boundary
The ___________________________ boundary results from tectonics plates crashing into each other.
What is convergent boundary
A number of rigid, but moving pieces of Earth's surface
What is tectonic plates.
Evidence of matching animal fossils were found on these 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 more dense/less dense than cool air or liquid. Choose one.
What is more dense
This is located right below the lithosphere and contains the upper mantle. Plates float on top of this.
What is the asthenosphere
The name of the Supercontinent believed to exist 250 million years ago
What is Pangaea
_________________ is a natural disaster that results from the build up of stress at a plate boundary.
What is earthquakes
The name of the process in which new oceanic crust is created at a Mid-Ocean Ridge
What is seafloor spreading
The name of the theory that replaced the Continental Drift Theory
What is the Plate Tectonics Theory
This is the mechanism (what causes) the plates to move
What is convection currents in the mantle
The ____________ boundary is where most earthquakes occur than the other plate boundaries.
The Earth's crust is thinnest under the __________________ crust and thickest under the _____________________ crust.
What is thinnest under the oceanic crust and thickest under the continental crust.
Continental Drift Theory was not accepted because it did not explain this:
What is how the continents moved
The name of the two different processes that can occur at convergent boundaries
What is subduction (where volcanoes often occur) and uplift (where mountains are usually formed)
The San Andreas fault in California is an example of a ___________ boundary.
What is a Transform boundary