Evidence of Plate Motion
Continental Drift
Two continental plate collide at a convergent boundary
When tension is applied to Earth's surface what happens?
It gets thinner
This volcano source is found away from a plate boundary, and frequently erupts at the Earth's surface. (Think Hawaiian Island)
Hot Spot
A wave or series of waves produced by an earthquake or landslide
Tsunami
The evidence that supported the hypothesis of continental drift included these three things
fossils, land features, and climate data
What is convection?
The circular movement of materials in the mantle
What type of stress shortens and thickens Earth's crust?
Compression
This type of volcano has alternating layers of lava and ash.
Composite volcano
A single number that geologist use to assign to an earthquake based on its size.
magnitude
These are zipper like mountain ranges that run across the floor of the ocean.
mid-ocean ridges
Plates move apart from each other at what boundary?
Divergent
On a moment magnitude scale, each whole number increase represents how much of an energy increase?
32-fold energy increase
This type of volcano have slow steady eruptions that builds up over a broad area making it more rounded.
Shield volcano
A break in the rock of Earth's crust or mantle.
fault
What is it called when dense oceanic crust meets another section of crust and sinks back into the mantle
subduction
Earthquakes often occur along these as a result of built up stress
plate boundaries
How do earthquakes and landslides create tsunamis?
They create water displacement that causes a tsunami.
What are the two types of eruptions?
Quiet and explosive
What is shearing?
rock is being pushed in two opposite directions
This process is continually adding material to the ocean floor, and pushing older rock outwards
Sea-Floor Spreading
This type of boundary has plates that slide or slip past each other in opposite directions
transform
Shaking and trembling that results from a plate movement is know as an....
Earthquake
What is a major factor in what type of volcanic explosion will happen?
Silica content in magma, the higher the silica levels the more explosive it will be.
The force that acts on rock to change its shape or volume
Stress