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 Earthquakes 34 Flashcards |
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What is the term for the point inside the Earth's crust where an earthquake originates? |
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 Focus |
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Which type of seismic wave travels only through solids and arrives after P waves? |
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S Waves (Secondary Waves) |
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True or False: Tsunamis can only be caused by earthquakes. |
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 False. Tsunamis can also result from volcanic eruptions or meteorite impacts. |
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Fill in the blank: The ______ is the point on the Earth's surface directly above the focus of an earthquake. |
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 Epicentre |
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Riddle: I’m the fastest seismic wave, traveling through solids, liquids, and gases. What am I? |
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 P Waves (Primary Waves) |
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What percentage of earthquakes occur in the Circum Pacific Mountain Belt? |
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About 70% |
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Fill in the blank: Earthquakes measuring _____ or higher on the Richter scale can cause significant damage. |
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6 |
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True or False: Earthquakes can create new landforms and improve navigation. |
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 True |
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What device measures and records details of an earthquake such as its force and direction? |
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 Seismograph |
Card: 18 / 34 |
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Riddle: I can cause buildings to shake and landscapes to change, but I’m often invisible. What am I? |
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 Earthquake |
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Which type of earthquake wave is recorded last on a seismograph? |
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L Waves (Long Waves) |
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Fill in the blank: Earthquakes are most common along ______ boundaries. |
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 Plate |
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What phenomenon can occur under the sea as a result of underwater earthquakes? |
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 Tsunamis |
Card: 26 / 34 |
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Fill in the blank: Isostatic disturbances can lead to earthquakes due to changes in the balance between oceans and ______. |
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 Continents |
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What is the impact of earthquakes on coastal areas, as seen in Dwarka, Gujarat? |
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 Submergence |
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Which region in India is particularly prone to earthquakes due to tectonic plate boundaries? |
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 Himalayan foothills |
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Riddle: I’m a measurement of an earthquake’s intensity, but I rely on human observation. What am I? |
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Mercalli Scale |
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