What was the initial clue that led scientists to investigate the Oklo mine?
Oklo, the Two Billion Year Old Nuclear Reactor

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Science, Physics, Social Studies, Chemistry
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11th Grade - University
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The presence of unusual minerals
A lower than expected concentration of Uranium-235
Strange geological formations
High levels of radiation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which isotope of uranium is crucial for nuclear reactions due to its ability to release significant energy?
Uranium-235
Uranium-234
Uranium-236
Uranium-238
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role did groundwater play in the natural nuclear reactor at Oklo?
It slowed down neutrons to sustain the reaction
It absorbed excess radiation
It accelerated the reaction
It provided additional uranium
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How did the natural nuclear reactor at Oklo prevent a runaway reaction?
By boiling off groundwater to stop the reaction
Through the natural decay of uranium
By using control rods
By releasing excess neutrons into the atmosphere
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What eventually caused the natural nuclear reactor at Oklo to stop operating?
The introduction of foreign elements
A geological shift
The depletion of Uranium-235
A sudden increase in temperature
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