Earthquakes Flashcards
the origin of seismic energy-where an earthquake occurs- is called the…
focus
the point on the earth’s surface above the focus is called …
the epicentre
_____ movement causes stress to build up within the “crustal” rocks until the rocks break along the line of a _____ or crack in the earth’s crust
plate
fault
seismic energy from the focus travels in all directions as
seismic waves
earthquakes are recorded using an instrument called a
seismograph
the violent shaking of the ground is a ______ effect of an earthquake
primary
3 secondary effects of an earthquake could be
fires
disease
tsunamis
if an earthquake happens at sea, it can cause huge waves which travel up to 1000km at sea and up to 65 km close to land when they can reach up to 15 metres in height, called….
tsunamis
what kinds of violent active movements are normally found at plate boundaries?
earthquakes and volcanoes
in a volcanic eruption, molten magma can escape as ____
lava
the scale used to express the magnitude of an earthquake is called the ______ scale
Richter
how was Tokyo quite well prepared for an earthquake?
good engineering
early warning systems
detection buoys sent warnings
high sea walls
T or F modern Japanese buildings have rubber shock absorbers to help them move with the earth if there is an earthquake
True
what industry will have been badly affected in Japan by the tsunami?
car industry
Would anything else be badly affected in a tsunami?
supply chains for iPad batteries and flash memory storage
