Earthquake Flashcards
Where are the Tectonic Plates located?
The Tectonic plates are located in the lithosphere, above the Asthenosphere.
What causes plates to form?
Plates are formed due to the heat from the inner core, causing the crust to break apart.
An example of this is a bread in the oven, when the oven is baked, the outer layer breaks apart due to the heat, but not not fully breaking apart.
What are Tectonic Plates?
A massive, irregularly shaped slab of solid rock.
What are plate boundaries?
The plate boundary is the edge of the plate to another plate.
What are the two types of plates?
The Continental and Oceanic Plates.
Which is denser, the Continental or the Oceanic Plate?
The Oceanic Plate
Is lower density on top or bottom?
Lower density is always on the bottom, because the higher the density the more the mass an object has, resulting it to sink down the bottom, or to be always on the bottom.
What is a Fault?
Faults are cracks in the Earth’s crust along which there is movement.
It is formed in the Earth’s crust as a brittle response to stress. Generally, the movement of the Tectonic plates provide the stress, and rocks at the surface break in response to this.
What causes Earthquakes?
Plate movements
What are the seismic waves the is released during an earthquake?
- P-Wave (Primary Wave)
The first seismic wave detected by seismographs, able to move through liquid and solid rocks. - S-Wave (Secondary Wave)
The second wave detected by the seismograph, travels slower than P-Wave because S-Waves do not travel through liquid. - Rayleigh Waves
Surface wave, move in an elliptical motion. - Love Waves
Surface waves,
What seismic wave causes the damage during the earthquake?
The Secondary Wave or the S-Waves.
It is much more destructive than the P-Wave.
What records the seismic waves?
The seismograph
What are seismic waves?
Waves that are caused by an earthquake.
How many seismic station does it take to accurately record the location of the epicenter?
It takes three seismic station.
What is the epicenter?
The point on the Earth’s surface directly above the focus is the epicenter.
