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Science 9th Sem 1 — Sect 3 — Earthquakes/Volcanos
  • Jace Campana

  • 問題数 20 • 12/11/2023

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    問題一覧

  • 1

    A 5.0 earthquake is approximately ______ times stronger than a 3.0 earthquake

    900

  • 2

    Most earthquakes occur ______

    At plate boundaries

  • 3

    A cone formed by only solid fragments, built up round of volcanic opening is a _______

    Cinder cone

  • 4

    In the process of elastic rebound, as rock becomes stressed, at first ______

    Deforms

  • 5

    The volcanoes in Hawaii erupt quietly, with little build up of gases. This is common with. _____

    Mafic magma

  • 6

    _______ cools in smooth, ropy textures.

    pahoehoe lava

  • 7

    The depression that results when a volcanic cone collapses over an emptying magma chamber is a _____

    Caldera

  • 8

    Vibrations in Earth that are caused by the sudden movement of rocks are called _____

    Earthquakes

  • 9

    scientists have discovered that before an eruption, earthquakes commonly _____

    Increase in number

  • 10

    Which of the following is NOT a method used to forecast earthquake risks?

    Determining moment magnitude

  • 11

    Explosive volcanic eruptions commonly result from ______

    Felsic magma

  • 12

    Which of the following is NOT a type of seismic wave?

    R waves

  • 13

    ______ volcanoes are wide, shallow-sloped volcanoes, generally formed from gentle eruptions

    Shield volcanoes

  • 14

    S waves cannot pass through _____

    Earth's outer core

  • 15

    Pyroclastic materials that form rounded or spindle shapes as they fly through the air are called _____

    Volcanic bombs

  • 16

    The primary difference between volcanic ash, lapilli, volcanic bombs, and volcanic blocks, is ______

    The size of the object

  • 17

    Areas of volcanism within tectonic plates are called ________

    hot spots

  • 18

    A characteristic of lava that determines the force of a volcanic eruption is _______

    Viscosity

  • 19

    To fully detect the motion created by an earthquake, a seismograph requires how many sensors?

    3

  • 20

    Which of the following should you NOT do during an earthquake?

    If driving, stop in place underneath a bridge or overpass