Question | Answer |
What theory explains the motions of earth's continents over time? | Continental Drift |
Who first developed the idea that continents were moving? | Alfred Wegner |
List the Earth's internal layers from inside to outside. | Core, Mantle, Crust |
what type of plate boundaries occur along the west coast of the United States when the Pacific plate grinds past the North American Plate? | transform |
what kind of boundary forms when ocean crust is pushed under continental crust during a subduction? | subduction zone |
identify the type of folded rock layer that bends downwards and has younger rock layers in the core (center). | syncline |
During a reverse fault, the hanging wall moves up relative to the foot wall. What type of stress causes this? | compaction |
what type of seismic waves are the fastest moving? | Primary (p) waves |
P-waves, S-waves, and L-waves are also known as what? | seismic waves |
What may an undersea earthquake cause? | tsunami |
What is the rating system that is used to measure energy released during an earthquake called? | Magnitude |
what is the place inside the earth where the energy of an earthquake is centered called? | Focus |
what instrument is used to record and measure earthquakes? | seismograph |
what is the location on the earth's surface directly above the place where an earthquake occurs called? | epicenter |
The forcefulness of an eruption of a volcano is mostly dependant on what? | silica content |
which type of volcano is a steep sided mountain composed of alternating layers of lava and tephra? | composite |
which type of volcano sometimes erupts violently, forming a layer of tephra and sometimes erupts quieter forming a layer of lava? | composite |
which volcano is a small steep sided cone formed from tephra, usually short- lived | cindercone |