Vocabulary
Structure of the Earth
Volcanoes and Earthquakes
Plate Tectonics
Miscellaneous
100

The thinnest and outermost layer of the Earth

What is the crust

100

These are the three main layers of the Earth.

What is crust, mantle and core

100

Where do most earthquakes and volcanoes form?

What is plate boundaries
100

What type of lithospheric plate is denser?

What is oceanic plate

100
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary
200
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
200
The thickest layer of the Earth
What is the mantle.
200

Earthquakes are measured using this scale

What is the moment magnitude scale (we no longer use the Richter scale)

200
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
200

Hot liquid (magma) is less ________________ than cool liquid (magma)

What is dense

300

The theory that all continents are fragments of Pangaea now drifting apart

What is the Continental Drift Theory or "plate tectonics"

300
Plates float on top of the _______________________.
What is the asthenosphere
300

The Hawaiian shield volcanoes were formed from this abnormality in the mantle

What is a hot spot

300

Name four of the major plates

What is any of the following North American plate, South American plate, Eurasian Plate, Indoaustralia plate, African plate, Antarctica plate

300
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
400
States that youngest rocks of ocean floor are at divergin boundaries, moving outward
What is seafloor spreading
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 volcano forms at subduction boundaries, and has thick, viscous lava that often blocks gas escape and causes explosive eruptions

What is stratovolcano

400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
400
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
500
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core
500

This type of crust is thick and older

What is continental crust

500

Earthquakes have both ___and ___ waves

What is s and p

500

The three types of convergent boundaries

What is oceanic-continental subduction (where volcanoes often occur), oceanic -oceanic subduction (trenches) and continental-continental collision (where mountains are usually formed)

500

This oceanic-oceanic subduction trench goes challenger deep

What is the Mariana trench

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