Earthquake is one of the most devastating natural calamities which Blank 1 Question 2 (caused, will cause, had caused, causes) sudden shaking of the earth surface. It, not only causes damage to buildings and other structures but alsoBlank 2 Question 2 (affected, will be affected, had affected, affects) the surrounding environment and our lifestyle significantly. An earthquake can trigger many sudden changes in the environment which can Blank 3 Question 2 (would be classified, will classify, is classified, be classified) as primary and secondary. The subsidence and surface faulting Blank 4 Question 2 (is, was, were, are) the primary changes. The secondary effects are the displaced rocks, tsunami, ground cracks, liquefactions, landslides. These effects are known as earthquake environmental effects. The scales which use these effects of an earthquake as a parameter for assessment Blank 5 Question 2 (is known ,were known ,was known, are known) as Earthquake Intensity Scales. These scales Blank 6 Question 2 (quantified, quantification, quantity,quantify)  an earthquake based on the observed effects on the surroundings .The magnitude scales for earthquakes are logarithmic scales. The Richter scaleBlank 7 Question 2 (are based ,were based, had based, is based) on seismograph readings measuring Earth movement. In addition to the Richter scale, scientists also Blank 8 Question 2 (using ,will use, had used,use) a Moment Magnitude that measures the total energy of an earthquake, called the seismic moment. The seismic moment of an earthquake Blank 9 Question 2 (were determined, are determining, had determined, is determined) based on three factors. The first factor is the distance that rock slides along a fault surface after it breaks, called the fault slip. The second factor is the area of the fault surface that Blank 10 Question 2 (are, was, were, is)  actually broken by the earthquake. And the third factor is the measurement of how rigid the rocks are near the broken fault.

Except one, others are Effects of Earthquakes, Which one is it?Question 4Answera.Landslides and deep cracks in surface rocks.b.The rise or lowering of the sea floor.c.Provide fertile soil.d.The devastation of cities, fires and diseases.

Which of the following is NOT listed as a potential geologic threat during an earthquake? 2 marksa. Rupture of the earth b. Triggering landslides c. Creation of new islands d. Turning the surface of the earth into liquid

.A ___________earthquake is one that occurs when the earth's crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes.*1 pointtectonicvolcaniccollapseexplosion

19. Earthquakes are caused by the sudden release of_________________ which moves as _____________ through the earth.*1 pointenergy, waveswaves, energyenergy, heatheat, energy

1. What is the location where the rupture of an earthquake begins and energy is released called?*1 pointfaultfocusepicentertectonic plates2.  What is a sudden and violent shaking of the ground that sometimes causes great destruction due to movements within the earth's crust or volcanic action?*1 pointeruptionlandslideearthquaketectonic plates3. The point on the earth's surface vertically above the focus of an earthquake.*1 pointfaultfocusepicenterplates3.  Scientists use different ways to find out if a fault is active. Which one is NOT included?*1 pointScientist created a fault model.Scientist observed the surroundings.Scientist checked the country’s historical record.Scientist studied the past and present vibrations.5.  Which scale measures the magnitude, or size, of an earthquake?*1 pointFujita ScaleSeismoscaleMercalli ScaleRichter Scale6. Scale that is based on observable earthquake damage.*1 pointFujita ScaleSeismoscaleMercalli ScaleRichter Scale7. Why can't we feel all of Earth's earthquakes?*1 pointIt happen so fast.It is very gentle.It is not happeninng.It happen deep inside the Earth.8.   What should expect to happen immediately after an Earthquake?*1 pointaftershockseruptiontyphoontsunami9.  How do scientists find out the intensity and duration of Earthquakes?*1 pointSeismic wavesSeismographSeismogramSeismos10. What is a wave generated by earthquake vibrations called?*1 pointSeismic wavesSeismographSeismogramSurface wave11. Earthquakes are common occurrence in Japan, Indonesia, and Philippines. Why is this so?*1 pointJapan, Indonesia and Philippines are surrounded by seas.Japan, Indonesia and Philippines are located near the equator.Japan, Indonesia and Philippines are considered archipelagic countries.Japan, Indonesia and Philippines are found within the Pacific Ring of fire.12. Based on measurement of the maximum motion recorded by a seismograph.*1 pointtremorsintensitymagnitudeseismic waves13.  The strength of the shaking from an earthquake is called ___________.*1 pointtremorsintensitymagnitudeseismic waves14. Seismic scale used and developed by the Philippine Institute of Volcanology and Seismology to measure the intensity of an earthquake. It was developed as upon a specific response to the 1990 Luzon earthquake.*1 pointMercalli scaleRichter scaleSeismoscalePEIS15. Scientists who study earthquakes, their causes and effects?*1 pointearthquakologistvolcanologistseismologistsmeteorologist16. What is the study of earthquakes?*1 pointseismologyvolcanologyearthquakologyplate tectonicology