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Questão FC689035

READ TEXT I AND ANSWER THE FOLLOWING QUESTION: TEXT I Products and dynamics of lava-snow explosions: The 16 March 2017 explosion at Mount Etna, Italy Abstract Volcanic hazards asso

Semântica e Significado de Vocábulos (Semantics)

FGV · 2025

READ TEXT I AND ANSWER THE FOLLOWING QUESTION:

 

TEXT I

 

Products and dynamics of lava-snow explosions: The 16 March 2017 explosion at Mount Etna, Italy

 

Abstract  

Volcanic hazards associated with lava flows advancing on snow cover are often underrated, although sudden explosions related to different processes of lava-snow/ice contact can occur rapidly and are only preceded by small, easily underrated precursors. On 16 March 2017, during a mildly effusive and explosive eruption at Mount Etna, Italy, a slowly advancing lava lobe interacted with the snow cover to produce a sudden, brief sequence of explosions. White vapor, brown ash, and coarse material were suddenly ejected, and the products struck a group of people, injuring some of them. The proximal deposit formed a continuous mantle of ash, lapilli, and decimeter-sized bombs, while the ballistic material travelled up to 200 m from the lava edge. The deposit was estimated to have a mass of 7.1 ± 0.8 × 104 kg, which corresponds to a volume of 32.0 ± 3.6 m3 of lava being removed by the explosion. Data related to the texture and morphology of the ejected clasts were used to constrain a model of lava-snow interaction. The results suggest that the mechanism causing the explosions was the progressive build-up of pressure due to vapor accumulation under the lava flow, while no evidence was found for the occurrence of fuel-coolant interaction processes. Although these low-intensity explosions are not particularly frequent, the data set collected provides, for the first time, quantitative information about the processes involved and the associated hazard and suggests that mitigation measures should be established to prevent potentially dramatic accidents at worldwide volcanoes frequented by tourists and with fairly easy access, such as Etna.

 

Source: GSA Bulletin (2024) 136 (5-6): 2325–2342. Available at

https://pubs.geoscienceworld.org/gsa/gsabulletin/article/136/5-6/2325/628546/Products-and-dynamics-of-lava-snow-explosions-The

 

The closest translation into Portuguese of “Volcanic hazards associated with lava flows advancing on snow cover are often underrated” is

  1. As explosões vulcânicas associadas ao derramamento de lava sobre a neve são sempre ignoradas.
  2. As erupções vulcânicas geralmente propiciam escoamentos de lava que avançam sobre a cobertura de neve.
  3. Os riscos das erupções vulcânicas devido ao fluxo de lava se adiantando sobre a neve costumam ser destacadas.
  4. As explosões vulcânicas produzem fluxos de lava que, associados a coberturas de neve, podem ser perigosos.
  5. Os perigos vulcânicos associados aos escoamentos de lava avançando sobre a cobertura de neve são frequentemente subestimados.
Mostrar resposta e comentário

Gabarito

Errado

Comentário do professor

A alternativa apresenta uma tradução fiel e natural da frase em inglês. Mantém o sujeito e a ideia central ao traduzir “volcanic hazards” por “perigos vulcânicos”, preservando o sentido técnico de risco.

Conserva corretamente a relação “associated with” por “associados a” e reproduz com precisão a locução que qualifica onde ocorrem esses perigos: “escoamentos de lava avançando sobre a cobertura de neve”, com concordância adequada.

Traduziu “often underrated” por “frequentemente subestimados”, expressão que preserva tanto a noção de frequência quanto a de avaliação insuficiente dos riscos. Em suma, a alternativa mantém o vocabulário técnico e a nuance do original, resultando em português claro e preciso.

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