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Who discovered the planet Neptune?

  • (A) William Herschel
  • (B) John Couch Adams
  • (C) Galileo Galilei
  • (D) Johann Gottfried Galle

Answer: Johann Gottfried Galle

Johann Galle, along with John Couch Adams, discovered Neptune in 1846, using mathematical predictions.

Who is known for formulating the laws of planetary motion?

  • (A) Isaac Newton
  • (B) Galileo Galilei
  • (C) Johannes Kepler
  • (D) Albert Einstein

Answer: Johannes Kepler

Johannes Kepler formulated the three laws of planetary motion, which describe how planets move around the Sun.

Who developed the first theory of the atom?

  • (A) John Dalton
  • (B) Niels Bohr
  • (C) J.J. Thomson
  • (D) Albert Einstein

Answer: John Dalton

John Dalton developed the first atomic theory, which stated that matter is made up of indivisible atoms.

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Who discovered the first antibiotics, including penicillin?

  • (A) Robert Koch
  • (B) Alexander Fleming
  • (C) Louis Pasteur
  • (D) Edward Jenner

Answer: Alexander Fleming

Alexander Fleming discovered penicillin in 1928, the first antibiotic, which revolutionized medicine.

Who invented the first successful steam engine?

  • (A) Thomas Edison
  • (B) James Watt
  • (C) George Stephenson
  • (D) Richard Trevithick

Answer: James Watt

James Watt is credited with inventing the first practical steam engine, which played a pivotal role in the Industrial Revolution.

Who discovered the theory of electromagnetism?

  • (A) Albert Einstein
  • (B) Michael Faraday
  • (C) James Clerk Maxwell
  • (D) Niels Bohr

Answer: James Clerk Maxwell

James Clerk Maxwell developed the theory of electromagnetism, unifying electricity and magnetism into one theory.

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Who developed the theory of conditioned reflexes?

  • (A) Sigmund Freud
  • (B) Ivan Pavlov
  • (C) Carl Jung
  • (D) B.F. Skinner

Answer: Ivan Pavlov

Ivan Pavlov developed the theory of conditioned reflexes, demonstrating the process of classical conditioning.

Who invented the first functional microscope?

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

Answer: Antonie van Leeuwenhoek

Antonie van Leeuwenhoek is credited with developing the first functional microscope, leading to the discovery of microorganisms.

Who discovered the law of conservation of energy?

  • (A) Albert Einstein
  • (B) James Clerk Maxwell
  • (C) Hermann von Helmholtz
  • (D) Isaac Newton

Answer: Hermann von Helmholtz

Hermann von Helmholtz formulated the law of conservation of energy, stating that energy cannot be created or destroyed.

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Who developed the concept of the unconscious mind?

  • (A) Sigmund Freud
  • (B) Carl Jung
  • (C) Ivan Pavlov
  • (D) B.F. Skinner

Answer: Sigmund Freud

Sigmund Freud developed the theory of the unconscious mind, fundamentally altering the study of psychology.

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