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3. What does the magnitude of an earthquake mean? A. energy released by an earthquake B. effects of the earthquake on structures C. the energy released by a volcanic eruption D. effects of a volcanic eruption on structure 4. Which instrument is used to record and measure the earth's tremors? C. sphygmomanometer B. seismograph D. thermometer A. barometer 5. Which precautionary measures should be done before an earthquake? A. Prepare an emergency survival kit. B. Cover your nose with a damp cloth. C. Do riot cross bridges if you are driving. D. Check yourself and every family for injury. 6. What causes an earthquake? A. forces above Earth B. tremendous warping of the crust C. intense heat on the surface of the earth D. intense movement of liquid materials underneath 7. Which is used to measure the magnitude of an earthquake? A. Mercalli scale C. Richter scale B. seismograph D. thermometer 8. What is earthquake intensity? A. a measure of seismic risk B. a measure of the damage done C. a measure of the energy released D. a measure of an earthquake focus 9. What do you call a distinct boundary between the solid crust and the mantie? A. Atmosphere C. Fault B. Core D. Moho 10. What layer of the earth is made up of solid iron and nickel? A. Crust C. Mantle B. Inner core D. Outer core pls answer it i need it now
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