
Causa e Consequência do Ouro e Metais Preciosos na Terra
Flashcard
•
Other
•
3rd Grade
•
Practice Problem
•
Hard
REGUINA DREWNOWSKI
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10 questions
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1.
FLASHCARD QUESTION
Front
Mais de 99% do ouro existe no mundo.
Back
Está enterrado a quase 3 mil quilômetros de profundidade, com temperaturas de 5.000 °C.
2.
FLASHCARD QUESTION
Front
Se toda essa riqueza estivesse acessível na superfície.
Back
Haveria ouro suficiente para cobrir a superfície do planeta com 50 cm de espessura.
3.
FLASHCARD QUESTION
Front
Análise de rochas vulcânicas havaianas detectou rutênio-100.
Back
Isso revelou que parte da reserva de ouro está escapando e chegando à superfície.
4.
FLASHCARD QUESTION
Front
A equipe de Göttingen desenvolveu novas técnicas de análise isotópica.
Back
Permitiu comparar os dois tipos de rutênio (do núcleo e do manto).
5.
FLASHCARD QUESTION
Front
A diferença entre o rutênio do núcleo e do manto é minúscula.
Back
Até agora era impossível detectá-la.
6.
FLASHCARD QUESTION
Front
O material do núcleo da Terra (incluindo ouro) está se infiltrando no manto.
Back
Acaba chegando à superfície por meio do magma vulcânico.
7.
FLASHCARD QUESTION
Front
Não é possível escavar 2,9 mil quilômetros para chegar ao núcleo.
Back
Não permite a exploração comercial dessas riquezas minerais.
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