Question

PUCRS - adaptada) Leia o texto.



The agency has no official plans for a mission to the Jovian moon, whose icy crust covers a watery ocean in which life could theoretically exist. But spurred by intense congressional interest and several recent discoveries,NASA is seeking ideas for instruments that could fly on a mission to Europa.

The groundswell of enthusiasm is likely to be bolstered by the latest big news, reported on 7 September, that there may be giant plates of ice shuffling around on Europa – much as plates of rock do on Earth (S. A. Kattenhorn and L. M. Prockter Nature Geosci. 2014). Such active geology suggests that Europa’s icy surface is connected to its buried ocean – creating a possible pathway for salts, minerals and maybe even microbes to get from the ocean to the surface and back again.

Kattenhorn and Prockter propose a system of plate tectonics that involves a shell of ice a few kilometers thick sliding around on warmer, more fluid ice. When one plate hits another and begins to dive downwards – or subduct – it melts and becomes incorporated in the underlying ice, the duo proposes.

Places have already been spotted on Europa where fresh ice crust is being born, but the latest research is the first to pinpoint where it might be going to die.

But without high-resolution images from more areas, researchers cannot tell whether subduction might also be happening in other locations. If it turns out to be common, it might mean that the moon could be cycling life-friendly compounds between the surface and the deep, and that substantially increases the chance that its ocean is habitable, says Michael Bland, a planetary scientist at the US Geological Survey in Flagstaff, Arizona.

The discovery adds to excitement set off in December, when scientists reported plumes of water vapour spurting out at Europa’s south pole. The plumes have not been seen since, and they may or may not be related to Europa’s newly appreciated system of plate tectonics. NASA now needs to figure out what kind of mission might best explore these discoveries.

Disponível em: Acesso em setembro de 2014.



A frase sublinhada “But without high-resolution images from more areas, researchers cannot tell whether subduction might also be happening in other locations” poderia ser assim compreendida:

Escolha uma:
a. More high-resolution images can tell if subduction might be happening in other areas.
b. More high-resolution images cannot show researchers where subduction areas might be.
c. Without more high-resolution images, researchers can be told if subduction might be happening in other areas.
d. More high-resolution images cannot show if subduction might happen in other areas.
e. Without more high-resolution images, researchers can tell where subduction might be happening.

Answer 1

A resposta certa é a letra A.

Pois, de acordo com a frase sublinhada do texto: "Mas sem imagens de alta resolução de mais áreas, pesquisadores não podem dizer se a subducção pode estar acontecendo em outros lugares.", é possível perceber que se eles tivessem mais imagens de alta resolução, eles poderiam dizer se a subducção está acontecendo em outras áreas também. E na alternativa A está escrito exatamente isso: "Mais imagens de alta resolução podem dizer se a subducção está acontecendo em outras áreas".