
Estratigrafia 10º ano
Authored by Paula Caldas
Other
6th - 8th Grade
Used 8+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A passagem do Mesozóico para o Cenozóico, há cerca de 65,5 M.a., ficou marcada…
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Na crosta, em rochas com a mesma composição mineralógica, as mais antigas apresentam, para um determinado elemento _______, uma razão de isótopos-pai/isótopos-filho _______ do que rochas mais recentes.
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Para um mesmo isótopo radioativo, quando se comparam granitos mais recentes com mais antigos, é de esperar que
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A presença de Graptólitos em estratos sedimentares do Ordovícico permite determinar a idade_______ dessas rochas se esses fósseis apresentarem uma reduzida distribuição________ .
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
O sistema isotópico Hf-W (háfnio-tungsténio) caracteriza-se por ter um período de semivida de 9 Ma, logo, o tempo necessário para a desintegração de 75% de háfnio é
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
O isótopo de urânio 238U tem uma semivida de aproximadamente 4500 Ma, por isso, _______ após a formação do granito, ele deverá conter cerca de _______ do teor inicial de 238U.
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Se uma semivida corresponde à desintegração de 50% do isótopo-pai, duas semividas correspondem à desintegração de
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