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Who developed the first successful polio vaccine?

  • (A) Louis Pasteur
  • (B) Edward Jenner
  • (C) Jonas Salk
  • (D) Albert Sabin

Answer: Jonas Salk

Jonas Salk developed the first effective polio vaccine, leading to the near eradication of polio worldwide.

Who developed the first successful theory of evolution?

  • (A) Jean-Baptiste Lamarck
  • (B) Alfred Russel Wallace
  • (C) Charles Darwin
  • (D) Gregor Mendel

Answer: Charles Darwin

Charles Darwin developed the theory of evolution by natural selection, explaining the diversity of life on Earth.

Who is known for the discovery of the neutron?

  • (A) Ernest Rutherford
  • (B) J.J. Thomson
  • (C) Albert Einstein
  • (D) James Chadwick

Answer: James Chadwick

James Chadwick discovered the neutron in 1932, contributing to the understanding of atomic structure.

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Who invented the first successful electric light bulb?

  • (A) Nikola Tesla
  • (B) Benjamin Franklin
  • (C) Thomas Edison
  • (D) Michael Faraday

Answer: Thomas Edison

Thomas Edison invented the first practical and commercially successful electric light bulb, revolutionizing lighting technology.

Who developed the theory of the Big Bang?

  • (A) Edwin Hubble
  • (B) Albert Einstein
  • (C) Georges Lema?tre
  • (D) Carl Sagan

Answer: Georges Lema?tre

Georges Lema?tre proposed the theory of the Big Bang, suggesting that the universe began as a single point and expanded.

Who discovered that light travels in waves?

  • (A) Albert Einstein
  • (B) Thomas Young
  • (C) James Clerk Maxwell
  • (D) Niels Bohr

Answer: Thomas Young

Thomas Young demonstrated that light travels in waves through his famous double-slit experiment.

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Who is credited with developing the first modern electric motor?

  • (A) Nikola Tesla
  • (B) Michael Faraday
  • (C) Thomas Edison
  • (D) Benjamin Franklin

Answer: Michael Faraday

Michael Faraday developed the first modern electric motor, an essential breakthrough in electromagnetism.

Who discovered the process of pasteurization?

  • (A) Louis Pasteur
  • (B) Edward Jenner
  • (C) Robert Koch
  • (D) Joseph Lister

Answer: Louis Pasteur

Louis Pasteur discovered pasteurization, a method of heat-treating liquids to kill harmful microbes.

Who invented the first practical microscope?

  • (A) Antonie van Leeuwenhoek
  • (B) Robert Hooke
  • (C) Galileo Galilei
  • (D) Louis Pasteur

Answer: Antonie van Leeuwenhoek

Antonie van Leeuwenhoek invented the first practical microscope, which helped in the discovery of microorganisms.

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Who developed the first theory of atomic structure?

  • (A) J.J. Thomson
  • (B) Ernest Rutherford
  • (C) Niels Bohr
  • (D) John Dalton

Answer: John Dalton

John Dalton developed the first atomic theory, which stated that atoms are indivisible and combine in fixed ratios to form compounds.

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