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Earth Science Review--Volancanism/Natural REsour ...

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  • What is a vent?
    It is where lava erupts through an opening in Earth's crust
  • cinder-cone volcanoes have steep ---- and are ------ volcanoes
    sides; smallest
  • Why is Bamboo one of Earth's most versitile renewable resource?
    It can be used for food, shelter, & clothing. It does not need to be replanted, or use of pesticides/fertilizers.It's a grass, does not need to be replanted.
  • The volcano Izalco in El Salvador is a small, steep-sided volcano. What conclusions can be drawn about the characteristics of the lava that formed this volcano?
    Cinder-cone volanco- steep-sided & small; explosive eruptions
  • ___ refer to all processes associated with the discharge of magma, hot water, and steam.
    volcanism
  • Which type of volcano is the most explosive?
    composite volcanoes
  • Lava travels through a conduit to erupt through a __ at the top of the volcano.
    vent
  • Is carbon a renewalbe or nonrenewable resource? Why?
    renewable; it cycles inthe spheres
  • Which is the larger tephra? blocks or ash
    blocks
  • Give examples of nonrenewable resouces.
    coal, and oil
  • What is a conduit?
    tubelike structure in a volcano
  • What is a fissure?
    long cracks in Earth's crust
  • Describe the formation of a caldera.
    when the top or side of a volcano collapses into the magma chamber
  • Which label is the conduit?
    C
  • What is pyroclastic flow?
    flowing cloud of tephra and lava mixed with hot, suffocating gases
  • Wet minerals and rocks melt at lower temperatures than do dry minerals and rocks. T or F
    T
  • Most volcanoes form at plate boundaries. T or F
    true
  • Which label is the caldera?
    A
  • Why types of volcanoes form where plates move apart
    divergent volcanism
  • Are resources found everywhere on Earth, evenly?
    No, some places have more or less resources.
  • Why is pyroclastic flow dangerous?
    It is a rapidly moving cloud of tephra mixed with hot, suffocating gases.
  • Give an example of a resource that can b replaced at a sustainable rate?
    any type of organism (plant/animal)
  • Which label is the crater?
    E
  • Explain sustainable yield.
    the replacement of renewable resources at the same rate at which they are consumed.
  • Hot spots form at plate boundaries. T or F
    F, volcanoes that form far from plate boundaries
  • An increase in silica increases the viscosity of a magma. T or F
    F
  • Which label is the vent?
    B
  • Is aluminum a renewalbe or nonrenewable resource? Why?
    nonrenewable; finite amount in Earth
  • How is tephra classified?
    by size
  • How does the amount of silica afffect lava's viscocity?
    higher silica= higher viscosity/ lower silica = lower viscosity
  • Which one is a composite volcano?
    A
  • Presure decreases with depth below Earth's surface. T or F
    F
  • Is phosphorus a renewalbe or nonrenewable resource? Why?
    renewable; it cycles in the spheres
  • Which is the smaller tephra? blocks or ash
    ash
  • An increase in temperature increases a magma’s viscosity. T or F
    T
  • Give an example of sustainable yield.
    If you cut down a tree to use for energy, shelter or products; you will replant it. If you eat a chicken you will raise another to replace it.
  • The volcanoes in the Circum-Pacific Belt form as a result of magma rising upward into faults and fractures that form as tectonic plates diverge.T or F
    F
  • When a tectonic plate moves over a hot spot ......
    a chain of volcanoes form
  • What forms when a magma chamber collapses?
    caldera
  • In the most explosive type sof eruptions, lava accumulates to form a ___
    composite volcano
  • Compare and contrast magma and lava.
    Lava is on the surface of theEarth & lower temp.; Magma is from inside the Earth and higher temp.
  • What is tephra?
    Erupted material from an volcano
  • Relate how the amount of gas in magma is related to its explosivity?
    higher dissolved gas creates more pressure, thereby a more explosive eruptionosive
  • What is an inexhaustible resource?
    A resource that is not provided by  Earth, such as the sun's radiation to create solar energy or wind energy.
  • What is the order of volcanoes, from the oldest to the youngest
    Q, R, S, T
  • Relate how the viscosity of magma is related to its explosivity?
    higher viscosity= more explosive; lower viscocity = less explosive
  • The more natural resources a country has determines the contry's wealth and power. T or F
    T
  • Why types of volcanoes form where plates move together
    convergent volcanism
  • Which one is a cinder-cone volcano?
    B
  • Which label is the magma chamber?
    D
  • What type of boundary are the volcanoes at the Circum-Pacific and the Mediterian Belt?
    Convergent
  • What is the difference between a renewable resource and a nonrenewable resource?
    renewable resource is replacable in a short amount of time; nonrenewable takes a long amount of time to replace.
  • What is viscosity?
    internal resistance to flow
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