Vocabulary
There are ______________ main layers of the Earth.
What is four
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
The thickest layer of the Earth
What is the mantle.
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
Continental Drift is the Theory that all continents were once a part of what supercontinent?
What is Pangaea?
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is ocean and continents.
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
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
The youngest rocks are near what type of boundary?
What is a divergent boundary?
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
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
Plates float on top of the _______________________.
What is the asthenosphere
The two types of convergent boundaries
What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)
In what country can you swim between two diverging plates?
Iceland