Module 1 Lesson 2 And 3 Flashcards
(12 cards)
What theory says that the outer layer rigid of the earth is divided into two slabs at rock, called tectonic plate that move across the earths surface relative to each other, like slab of ice on a like?
Plate tectonic theory
The epicenter is directly located above?
The hypocenter or focus
Meaning of PHIVOLCS?
Philippine institute of volcanology and seismology
How do seismologists record seismic waves?
Using seismograph
Where do seismic waves start?
In the focus
Two types of seismic waves?
Body waves and surface waves
What waves propagate at the interior part of the earth that includes primary and secondary waves?
Body waves
What wave arrive after body waves and only propagate at the earths crust with a low frequency but the main cause of destruction?
Surface wave
What body waves moves like an accordion?
P wave
What body wave shakes from side to side and up and down?
S wave
This is the only wave that can pass through solid and liquid parts of the earth
P wave
“If the difference is greater, the earthquake epicenter is _____”
Far
