7. Why does tsunami occur? It is caused by ______. A. an earthquake in a plain C. an earthquake under the sea B. a big typhoon in the land D. both b and c 8. When is earthquake said to be of volcanic origin? If it occurs ________. A. in areas where folding of plates take place B. as magma flows out of the earth’s crust C. as a result of electromagnetic waves D. as nuclear explosion 9. Where does a tectonic earthquake frequently occur? A. in areas of high altitude C. at the earth’s mantle B. at the rims or edges of crustal plates D. in the ice-capped mountain ranges 10. Which activity can cause artificial earthquake? A. deforestation C. seawater pollution B. mining / quarrying D. building of water dams 11. What is the intensity of an earthquake when people panic and small objects start to move and fall? A. intensity I B. intensity II C. intensity III D. intensity IV 12. Where does an earthquake originate? A. centerfold B. epicenter C. focus D. all of the above13. Engineers are designing a 10-story building in an area where seismic activity has been declared. They are planning to make sure that the building can withstand an earthquake. Which would be the most effective procedure for these? Apply simulated earthquake forces __________________.A. to a scale model of the buildingB. during the construction of the buildingC. to the entire building once it has been builtD. that were used on other buildings built in the same area14. Which of the following describes a landslide?A. loose rocks falling over a mountainC. some parts of the ground open upB. giant waves in the oceanD. both a and b

Question

7. Why does tsunami occur? It is caused by ______. A. an earthquake in a plain C. an earthquake under the sea B. a big typhoon in the land D. both b and c 8. When is earthquake said to be of volcanic origin? If it occurs ________. A. in areas where folding of plates take place B. as magma flows out of the earth’s crust C. as a result of electromagnetic waves D. as nuclear explosion 9. Where does a tectonic earthquake frequently occur? A. in areas of high altitude C. at the earth’s mantle B. at the rims or edges of crustal plates D. in the ice-capped mountain ranges 10. Which activity can cause artificial earthquake? A. deforestation C. seawater pollution B. mining / quarrying D. building of water dams 11. What is the intensity of an earthquake when people panic and small objects start to move and fall? A. intensity I B. intensity II C. intensity III D. intensity IV 12. Where does an earthquake originate? A. centerfold B. epicenter C. focus D. all of the above13. Engineers are designing a 10-story building in an area where seismic activity has been declared. They are planning to make sure that the building can withstand an earthquake. Which would be the most effective procedure for these? Apply simulated earthquake forces __________________.A. to a scale model of the buildingB. during the construction of the buildingC. to the entire building once it has been builtD. that were used on other buildings built in the same area14. Which of the following describes a landslide?A. loose rocks falling over a mountainC. some parts of the ground open upB. giant waves in the oceanD. both a and b​

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Answer:7. d8.a9. a 10.__11. cguro b12. b13.___14. a

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