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Who invented the first working radio?

  • (A) Nikola Tesla
  • (B) Guglielmo Marconi
  • (C) Albert Einstein
  • (D) J.J. Thomson

Answer: Guglielmo Marconi

Guglielmo Marconi is credited with inventing the first working radio and transmitting radio signals across long distances.

Who was the first to describe the circulation of the blood?

  • (A) Andreas Vesalius
  • (B) William Harvey
  • (C) Hippocrates
  • (D) Galen

Answer: William Harvey

William Harvey is credited with discovering the circulation of blood, fundamentally changing medical science.

Who is credited with the invention of the first practical airplane?

  • (A) Charles Lindbergh
  • (B) Orville Wright
  • (C) Wilbur Wright
  • (D) Amelia Earhart

Answer: Wilbur Wright

Wilbur Wright, along with his brother Orville, is credited with inventing and flying the first successful airplane in 1903.

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Who discovered the concept of radioactivity?

  • (A) Niels Bohr
  • (B) Albert Einstein
  • (C) Henri Becquerel
  • (D) Marie Curie

Answer: Henri Becquerel

Henri Becquerel discovered radioactivity in 1896, marking the beginning of research in nuclear physics.

Who developed the first successful vaccine for smallpox?

  • (A) Albert Calmette
  • (B) Edward Jenner
  • (C) Robert Koch
  • (D) Joseph Lister

Answer: Edward Jenner

Edward Jenner developed the first successful smallpox vaccine in 1796, which led to the diseases eventual eradication.

Who discovered the structure of the atom?

  • (A) Albert Einstein
  • (B) Niels Bohr
  • (C) Ernest Rutherford
  • (D) J.J. Thomson

Answer: Ernest Rutherford

Ernest Rutherford discovered the structure of the atom, showing that atoms have a small, dense nucleus.

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Who is credited with the invention of the modern computer?

  • (A) Alan Turing
  • (B) John von Neumann
  • (C) Charles Babbage
  • (D) Bill Gates

Answer: Charles Babbage

Charles Babbage is credited with the invention of the modern computer for designing the first mechanical computer.

Who discovered that light has both wave and particle properties?

  • (A) Albert Einstein
  • (B) Louis de Broglie
  • (C) Max Planck
  • (D) Niels Bohr

Answer: Louis de Broglie

Louis de Broglie proposed that light exhibits both wave and particle properties, a key concept in quantum mechanics.

Who developed the first successful heart transplant?

  • (A) Michael DeBakey
  • (B) Christiaan Barnard
  • (C) Norman Shumway
  • (D) Paul Farmer

Answer: Christiaan Barnard

Christiaan Barnard performed the first successful heart transplant in 1967, which revolutionized organ transplantation.

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Who was the first to split the atom?

  • (A) Ernest Rutherford
  • (B) Niels Bohr
  • (C) Albert Einstein
  • (D) J.J. Thomson

Answer: Ernest Rutherford

Ernest Rutherford was the first to split the atom, proving the existence of the atomic nucleus.

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