Evidence of Plate Motions
The theory that all continents had once been fused together and over time have since drifted apart is known as what?
What is the Theory of Continental Drift
This theory states that Earth's lithosphere is broken up into distinct plates.
What is The Theory of Plate Tectonics
The shaking and trembling that results from plate movement is called an
earthquake
This is a structure that forms in Earth's crust when molten material or magma reaches Earth's surface
What is a volcano
A boundary where two plates slide past eachother
What is a transform boundary
This is the name of the scientist who proposed the Theory of Continental Drift
Who is Alfred Wegener
What is the main force causing plates to move?
Convection currents in the mantle
Similar to sound waves these waves are vibrations that travel through earth carrying energy released by various processes such as earthquakes and volcanoes
seismic
This volcano has layers of lava flow and ash falls, tends to be cone shaped and tall.
In a process called _________________ molten rock flows up through a crack in Earth's crust and hardens into solid strips of new rock on both sides of the crack
Sea Floor Spreading
What is Pangea
What are the three types of plate boundaries?
What is divergent, convergent and transform
A fold in rock that bends upward in an arch is called what?
An anticline
This volcano typically has quiet eruptions and covers a broad area and is not steep
A shield volcano
This is a break in the rock of Earth's crust or mantle
A fault
Explain two ways Alfred Wegener was able to propose that Pangea may have existed.
What is fossil evidence and what is land features
A boundary where two plates move away from eachtother is called a
What is a divergent boundary
The three types of stress are called what
tension, compression and shearing
A volcano with high silica content will likely have what kind of eruption
An explosive one
Before lava reaches the surface the molten material is called
magma
How did the discovery of mid ocean ridges support the hypothesis of continental drift?
It provided an explanation of how Earth continually generates its crust.
How many centimeters do plates move per year?
1 cm- 10 cm
Which type of stress produces reverse faults?
Compression
This volcano is known for its cone shape and explosive eruptions of ash, bombs and cinder
Cinder Cone Volcanoes
This is the name of the scale use to measure earthquakes that goes from 1-10 and is called
The Richter Scale