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Who is known for his work on the law of conservation of mass?

  • (A) Dmitri Mendeleev
  • (B) Antoine Lavoisier
  • (C) Albert Einstein
  • (D) Robert Boyle

Answer: Antoine Lavoisier

Antoine Lavoisier is known for discovering the law of conservation of mass, which states that mass cannot be created or destroyed in chemical reactions.

Who invented the first mechanical computer?

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

Answer: Charles Babbage

Charles Babbage is credited with designing the first mechanical computer, known as the Analytical Engine.

Who is credited with discovering that germs cause disease?

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

Answer: Louis Pasteur

Louis Pasteurs work on the germ theory of disease established that microorganisms can cause infections.

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Who discovered the laws of heredity through pea plant experiments?

  • (A) Alfred Russel Wallace
  • (B) Gregor Mendel
  • (C) Charles Darwin
  • (D) Niels Bohr

Answer: Gregor Mendel

Gregor Mendel is known as the father of genetics for his work on the inheritance of traits in pea plants.

Who first proposed the heliocentric model of the solar system?

  • (A) Galileo Galilei
  • (B) Johannes Kepler
  • (C) Nicolaus Copernicus
  • (D) Isaac Newton

Answer: Nicolaus Copernicus

Nicolaus Copernicus proposed the heliocentric model, which suggested that the Earth revolves around the Sun.

Who discovered the circulation of blood in the body?

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

Answer: William Harvey

William Harvey discovered the circulation of blood in the human body in the 17th century.

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Who is credited with inventing the modern steam engine?

  • (A) George Stephenson
  • (B) Richard Trevithick
  • (C) James Watt
  • (D) Michael Faraday

Answer: James Watt

James Watt improved the steam engine, making it more efficient and practical for industrial use.

Who proposed the theory of evolution by natural selection?

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

Answer: Charles Darwin

Charles Darwin developed the theory of evolution by natural selection, explaining how species adapt over time.

Who is known for developing the theory of quantum mechanics?

  • (A) Albert Einstein
  • (B) Max Planck
  • (C) Niels Bohr
  • (D) Werner Heisenberg

Answer: Max Planck

Max Planck is known for developing quantum theory, which laid the foundation for understanding atomic and subatomic behavior.

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Who discovered that the Earth orbits the Sun?

  • (A) Galileo Galilei
  • (B) Isaac Newton
  • (C) Johannes Kepler
  • (D) Nicolaus Copernicus

Answer: Nicolaus Copernicus

Nicolaus Copernicus proposed the heliocentric model of the solar system, showing that Earth orbits the Sun.

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