SCIENCE

• a FAULT is where the earths lithosphere is fractured or broken.
• a NORMAL FAULT id when the block of rock plane slides down relative to the other rock.
• REVERSE FAULT where the block of rock above the fault plane moves up relative to the othet block.
• STRIKE SLIP FAULT are vertical fractures where the blockd have mostly moved horizontally.
• ACTIVE FAULT has generated earthquakes within the last 10 000 years

  INACTIVE FAULT does not indicate signs of eatthquakes in the last 10 000 years
• The FOCUS or the HYPOCENTER of an earthquake is the point where the fault break begins.
• The EPICENTER is the location directly above the focus
• a SEISMOGRAPH is an instrumrnt that detecs, measures and records waves produced by earthquakes
• A SEISMOGRAM is a record of an earthquake
• BODY WAVES are those waves that past through the earths interior
• PRIMARY WAVES are those that move out from the earths focus.
• SECONDARY WAVES waves that moves slower and travels throught solid rocks
• SURFACE WAVES are seismic waces that travel along the earths outer layer
• LOVE WAVES are the fastest surface waves and moves the ground from side to side
• RAYLEIGH WAVES proudes a rolling motion
• INTENSITY is a measure of the amount of earthquake shaking at a given placed based on the amount of damagd
• PHIVOLCS uses the following scale
• MAGNITUDE of an earthquake is a measure of the size of the seismic waves or the amount of energy released at the source of the earthquake.
• RICHTER MAGNITUTUDE SCALE used to measure the magnitude of an earthquake
• MERCALLI INTENSITY SCALE measures the strength of an earthquake