Who discovered that the Earth's core is divided into solid inner and liquid outer layers? MCQ with Answer and Explanation

Who discovered that the Earth's core is divided into solid inner and liquid outer layers?
A. Inge Lehmann
B. Beno Gutenberg
C. Charles Richter
D. Andrija Mohorovičić
Answer: Option A
Solution (By JKExamLibrary)
Danish seismologist Inge Lehmann discovered the Earth's solid inner core in 1936 by studying seismic wave travel paths.

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Practice More Inventions and Discoveries Questions

Question #1 Report Error
Who invented the first functional polymer-based synthetic rubber, Neoprene?
A. Leo Baekeland
B. Charles Goodyear
C. Roy Plunkett
D. Wallace Carothers

Correct Answer: Option D


Explanation:
Wallace Carothers' research group at DuPont synthesized chloroprene polymer, marketing it as Neoprene in 1931.

Question #2 Report Error
Who discovered that light velocity shifts slightly depending on whether it moves parallel or perpendicular to the Earth's orbit, leading to the famous null result?
A. James Clerk Maxwell
B. Albert Michelson and Edward Morley
C. Albert Einstein
D. Hendrik Lorentz

Correct Answer: Option B


Explanation:
The Michelson-Morley experiment in 1887 found no evidence of the hypothetical luminiferous aether, laying the ground for relativity.

Question #3 Report Error
The invention of the common electronic computational methodology known as microprogramming was proposed by whom?
A. Charles Babbage
B. John von Neumann
C. Maurice Wilkes
D. Alan Turing

Correct Answer: Option C


Explanation:
Wilkes formulated microprogramming in 1951 to simplify computer central processing unit development matrix layers.