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9/10 right · avg 2.1s · 3d 22h ago
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The ten questions
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- 1Science › PhysicsEasyAn echo is an example of sound doing what?Right1.9s+100
- 2Science › ScientistsHardWho demonstrated in 1628 that blood circulates around the body?Right4.7s+96
- 3Science › ScientistsHardWho discovered the ABO blood groups in 1901?Wrong4.9s0
- 4Science › Units & MeasuresEasyWhat is the SI base unit of mass?Right1.2s+100
- 5Science › Inventions & ExperimentsExpertWhich instrument uses Josephson junctions to sense extremely weak magnetic fields?Right2.1s+100
- 6Science › ScientistsMediumWhich American flew a kite in a storm to study electricity?Right1.4s+100
- 7Science › PhysicsHardChromatic aberration in a simple lens arises because refractive index depends on what?Right1.3s+100
- 8Science › PhysicsVery hardThe Fraunhofer D lines in the solar spectrum are produced by which element?Right0.9s+100
- 9Science › Inventions & ExperimentsMediumWhich circuit component stores electrical charge on a pair of plates?Right1.1s+100
- 10Science › PhysicsMediumAn alpha particle is identical to the nucleus of which element?Right1.4s+100