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Extremely Hard Science Quiz Even Einstein would scratch his head!
Which of these is defined as a chemical substance that consists of just one type of atom?
Electric power is typically measured in what units?
A molecule that can act as an acid or a base is described as what?
Dogs' unique relationship with humans mean they are referred to as man's best what?
What happens to iron oxide in a blast furnace?
What is the second most abundant element in the Universe?
The gravity on the moon is what fraction of the gravity on Earth?
Which of the following is not a greenhouse gas?
When atoms join together what do they form?
Which waves can be transverse or longitudinal?
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Do you know who these famous people from the 60s and 70s are?
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Do you remember these old cities?
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Extremely Hard History Quiz, most people score only 3 out of 10.