Continental Drift
Plate Tectonics
Plate Boundaries
Faults
Earthquakes & Tsunamis
100
This German scientist suggested that today's continents were once joined together as one landmass.
Who is Alfred Wegener?
100
This scientific theory explains how large pieces of Earth's crust move and interact.
What is the theory of plate tectonics?
100
When plates grind past each other horizontally, this boundary forms.
What is a transform boundary?
100
A fracture in Earth's crust where movement occurs is called this.
What is a fault?
100
These are the fastest seismic waves and the first to be detected by a seismograph.
What are P waves?
200
This was the name of the ancient supercontinent that later broke apart.
What is Pangea?
200
These slow, circular movements in the mantle help move tectonic plates.
What are convection currents?
200
When two plates collide, it is known as this type of boundary, which can lead to subduction or mountain building.
What is a convergent boundary?
200
This type of fault, where the hanging wall slides down relative to the footwall, is commonly found at divergent boundaries.
What is a normal fault?
200
These seismic waves move up and down and side to side and cannot travel through liquids.
What are S waves?
300
This type of evidence is based on identical plant and animal remains that were found on separate continents.
What is fossil evidence?
300
Compared to continental crust, oceanic crust is thinner and more _____.
What is dense?
300
This process occurs at convergent boundaries when a denser oceanic plate sinks beneath a less dense continental plate.
What is subduction?
300
This is the primary type of stress that creates strike-slip faults at transform boundaries.
What is shearing?
300
*DAILY DOUBLE*
The point underground where an earthquake begins is called this.
For double points, answer this as well: The point on Earth's surface directly above where the earthquake begins is called this.
Underground: what is the focus?
Above Earth's surface: what is the epicenter?
400
This type of evidence was based on the overall shape and structure of individual continents.
What is continental fit?
400
This layer of Earth contains the rocky outermost crust and the brittle upper part of the mantle.
What is the lithosphere?
400
Mid-ocean ridges are most commonly found at this type of boundary.
What is a divergent boundary?
400
This type of stress is responsible for creating reverse faults at convergent boundaries.
What is compression?
400
Most tsunamis are triggered by this event beneath the ocean floor.
What is an underwater earthquake?
500
Many scientists did not accept continental drift at first because Wegener could not explain this.
What caused the continents to move?
500
This geologically active zone surrounds the Pacific Ocean and contains 90% of Earth's earthquakes.
What is the Ring of Fire?
500
This famous California fault is a classic example of a transform boundary.
What is the San Andreas Fault?
500
This is an image of a ___ fault, where the hanging wall moves down relative to the footwall.
What is a normal fault?
500
Tsunamis increase in height when they move into this type of water depth.
What is shallow water?