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Extremely Hard Science Quiz Even Einstein would scratch his head!
Which planet is the smallest of the "Gas giants"?
What is Hg the chemical symbol for?
Hematite makes up the surface of which planet?
Electric current is calculated by charge divided by what?
The gravity on the moon is what fraction of the gravity on Earth?
Electric power is typically measured in what units?
In an element the number of protons is equal to the number of what?
CO2 is the chemical formula for which gas?
Which of the following is not a greenhouse gas?
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