Show:
Structure of the Earth
Plate Tectonics
Earthquakes
Vocabulary
Miscellaneous
100

There are _________ main layers of the Earth.

What is four

100
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
100
Earthquakes and Volcanoes are usually located in relation to these
What is a plate boundary
100
This is the name of the last supercontinent that existed.

What is Pangea?

100

Pangaea existed this many millions of years ago

What is around 250-300 million years ago

200
The thickest layer of the Earth
What is the mantle.
200

The Himalayan mountains are the result of a __________ boundary.

What is convergent boundary

200
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
200

The epicenter is the point directly located above this point in an earthquake.

What is the focus?

200
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
300
Plates float on top of the _______________________.
What is the asthenosphere
300
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
300

Earthquakes can result from transform boundaries, but also from this boundary where two plates are moving towards each other.

What are convergent boundaries?

300
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
300
Continental Drift Theory was not accepted because it did not explain this
What is how the continents moved
400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
400

This type of plate boundary involves plates moving away from each other.

What is divergent boundary?

400

This type of seismic wave does NOT travel through liquid.

What is an S-Wave?

400

One tectonic plate being forced under another is referred to as this term.

What is subduction?

400

Give me one of two features that are formed when one oceanic plate is forced below another oceanic plate?

What are trenches and volcanic islands?

500

___________ crust is the thinnest and ____________ is the thickest.

What is Oceanic and Continental

500

Describe two results from convergent boundaries

What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)

500

This theory states that tectonic plates deform gradually over time and then snap back to their original, undeformed state.

What is Elastic Rebound Theory

500

States that youngest rocks of ocean floor are at diverging boundaries, moving outward

What is seafloor spreading

500
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