Who discovered the planet Pluto in 1930 at the Lowell Observatory? MCQ with Answer and Explanation
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Question #1
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Who discovered that the Earth's core is divided into solid inner and liquid outer layers?
Correct Answer: Option C
Explanation:
Danish seismologist Inge Lehmann discovered the Earth's solid inner core in 1936 by studying seismic wave travel paths.
Danish seismologist Inge Lehmann discovered the Earth's solid inner core in 1936 by studying seismic wave travel paths.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who invented the first practical, safe, non-flickering miner's safety lamp alongside Humphry Davy?
Correct Answer: Option B
Explanation:
George Stephenson independently invented a similar safety lamp (Geordie lamp) in 1815, around the exact same time as Davy.
George Stephenson independently invented a similar safety lamp (Geordie lamp) in 1815, around the exact same time as Davy.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who discovered that certain elements always react in fixed small whole number proportions by weight, establishing the Law of Definite Proportions?
Correct Answer: Option B
Explanation:
French chemist Joseph Proust proved chemical compounds contain fixed constituent mass ratios, verifying early atomic tracking.
French chemist Joseph Proust proved chemical compounds contain fixed constituent mass ratios, verifying early atomic tracking.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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