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6th Grade Test 5

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  • A break that appears at the boundary between two moving masses of rock is known as a _________
    fault
  • a volcano that has been active at some time in recorded history, but has not had a recent eruption
    dormant
  • Running along the edge of the Pacific Ocean, the _______ is named for its many volcanoes
    Ring of Fire
  • A volcano that has erupted recently
    active
  • The _______ is created when trapped gases blast through the earth's surface
    vent
  • Any trembling or shaking of the earth's crust is defined as an _________
    earthquake
  • a volcano that produces lava fountains or fire curtains
    Hawaiian
  • A depression found at the top of a volcano is called a _______
    crater
  • the study of earthquakes
    seismology
  • a volcano characterized by hot clouds of gas and dust that it expels
    Pinion
  • Smaller fragments of molten rock that solidify almost instantly are called _______
    tephra
  • scientists who study the structure of the earth
    geologists
  • Holes or cracks which serve as escape vents for underground gases are called _______
    fumaroles
  • The temperature of rocks _________ with depth
    increases
  • The point underground where an earthquake begins is called the _________
    focus
  • the process by which new soil is formed as rocks crumble and break into smaller pieces
    weathering
  • A ________ allows molten rock and hot gases to escape from within the earth
    volcano
  • Earthquakes sometimes called monstrous waves called _______
    tsunamis
  • A volcano that has not erupted in recorded history
    extinct
  • the underwater mountain ranges
    mid-oceanic ridges
  • The boundary between earth's crust and its mantle
    Moho
  • three main sections of the earth
    crust, mantle, core
  • The place at ground level that is directly above the focus of an earthquake is known as the ________
    epicenter
  • Magma that has reached the earth's surface is called _______
    lava
  • ____________ occurs when natural acids slowly eat into rock, breaking it apart
    Chemical weathering
  • The strength of an earthquake is called its ________
    magnitude
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