Misc.
Plate Tectonics
Plate Tectonics
Volcanoes
Earthquakes
100
A _____________ boundary is where two plates slip past eachother in opposite directions.
What is transform?
100
The geological theory that staes the pieces of Earth's lithosphere ar in constant, slow mtoion is the theory of ____________________.
What is plate tectonics?
100
A place where two plates meet is called the ____________.
What is the boundary?
100
Before lava reaches the surface it is called____________?
What is magma?
100
Free Points!
Woo Hoo!
200
The Richter scale measures the ______________________ in an earthquake.
What are seismic waves?
200
A _________________ froms at a divergent plate boundary on land.
What is a rift valley?
200
A break in the Earth's crust is called a ___________ or a _________ __________.
What is fault or fault line?
200
Volcanoes along converging oceanic plate boundaries may form an __________ ________.
What is an island arc?
200
________________ forces (stress) in Earth's plates pulls on the crust, stretching rock so that is becomes thinner in the middle.
What are tension?
300
The time it takes for a radioactive element to decay half of its atoms is called its __________________.
What is half life?
300
Sea floor spreading, molten material rises from teh matle and erupts along the___________________________.
What are the mid ocean ridges?
300
A place where two plates slip past each other, moving in opposite directions is called a _______________ boundary.
What is a transform?
300
An _________ volcano is one that is erupting or show signs of erupting in the near future.
What is active?
300
The first waves that arrive first and move by compressing and expanding are ______________.
What are P waves?
400
The rating scale that measures total energy in an earthquake is the _________________________.
What is the Modified Moment Scale?
400
The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle is known as _________________________.
What is subduction?
400
The stress that causes the plates to move in two opposite directions is called ______________.
What is strike slip?
400
A tall, cone shaped moutain in which layers of lava alternate with layers of ash are called ___________ volcanoes.
What are composite?
400
S waves move the Earth in what way?
What is side to side?
500
A ________________________ forms at a divergent plate boundary in the ocean.
What is the mid ocean ridge?
500
Free Points!
Woo Hoo!
500
Most divergent boundaries where plates move apart occur along the ________ __________ ____________.
What are the mid ocean ridges?
500
Ash, cinder and bombs build up in a steep pile to form _______________ volcanoes.
What are cinder cone?
500
The highest risk of earthquakes in the US is the _________ coast.
What is west?
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