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Extremely Hard Science Quiz Even Einstein would scratch his head!
Which planet takes 29 Earth years to orbit the Sun?
A particle whose substructure is unknown is called a what?
Dogs' unique relationship with humans mean they are referred to as man's best what?
Which of these metals can be added to gold to make 'white gold'?
Which of these elements' chemical symbols comes first alphabetically?
Epoch J2000 refers to which planet?
A molecule that can act as an acid or a base is described as what?
What is the pH value of seawater?
Iapetus is a moon of which planet?
Which planet is the smallest of the "Gas giants"?
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