Scientific Discoveries Practice Questions
20 free Scientific Discoveries practice questions for the Static GK. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which scientist is credited with the discovery of the first antibiotic, Penicillin, in 1928?
- A Louis Pasteur
- B Alexander Fleming
- C Robert Koch
- D Frederick Hopkins
Correct answer: Alexander Fleming
Alexander Fleming discovered penicillin when he noticed that a mold called Penicillium notatum had killed bacteria in a petri dish. This discovery revolutionized the treatment of infectious diseases.
The discovery of X-rays, which earned the first Nobel Prize in Physics, was made by whom?
- A Wilhelm Röntgen
- B Marie Curie
- C Henri Becquerel
- D Ernest Rutherford
Correct answer: Wilhelm Röntgen
Wilhelm Röntgen discovered X-rays in 1895 while experimenting with cathode rays. He realized these rays could pass through human tissue but not bone, leading to the birth of medical imaging.
Who formulated the Laws of Motion and the Universal Law of Gravitation in 'Philosophiæ Naturalis Principia Mathematica'?
- A Galileo Galilei
- B Johannes Kepler
- C Isaac Newton
- D Robert Hooke
Correct answer: Isaac Newton
Isaac Newton's work published in 1687 laid the groundwork for classical mechanics. His laws described the relationship between a body and the forces acting upon it.
The discovery that the Earth revolves around the Sun (Heliocentrism) was famously championed by which Renaissance astronomer?
- A Claudius Ptolemy
- B Nicolaus Copernicus
- C Tycho Brahe
- D Giovanni Schiaparelli
Correct answer: Nicolaus Copernicus
Nicolaus Copernicus proposed the heliocentric model in his book 'De revolutionibus orbium coelestium'. This shifted the scientific consensus away from the geocentric (Earth-centered) model.
Which scientist discovered the three laws of planetary motion, showing that planets move in elliptical orbits?
- A Galileo Galilei
- B Johannes Kepler
- C Isaac Newton
- D Christiaan Huygens
Correct answer: Johannes Kepler
Johannes Kepler used the detailed observations of Tycho Brahe to determine that planetary orbits are elliptical rather than circular. This accurately described the varying speeds of planets at different points in their orbits.
Who is known for discovering the structure of the DNA double helix alongside Francis Crick?
- A James Watson
- B Gregor Mendel
- C Linus Pauling
- D Kary Mullis
Correct answer: James Watson
James Watson and Francis Crick determined the double-helix structure of DNA in 1953. Their work was significantly supported by the X-ray diffraction images taken by Rosalind Franklin.
The phenomenon of radioactivity was first discovered in 1896 by which scientist?
- A Marie Curie
- B Pierre Curie
- C Henri Becquerel
- D Ernest Rutherford
Correct answer: Henri Becquerel
Henri Becquerel discovered radioactivity while investigating phosphorescence in uranium salts. He found that the salts emitted rays that could fog photographic plates even without light.
Which scientist is credited with the discovery of the Electron in 1897 using a cathode ray tube?
- A J.J. Thomson
- B James Chadwick
- C Niels Bohr
- D John Dalton
Correct answer: J.J. Thomson
J.J. Thomson's experiments showed that cathode rays were composed of previously unknown negatively charged particles. This led to the 'Plum Pudding' model of the atom.
The discovery of the Neutron, a subatomic particle with no net electric charge, was made in 1932 by:
- A Ernest Rutherford
- B Max Planck
- C Werner Heisenberg
- D James Chadwick
Correct answer: James Chadwick
James Chadwick discovered the neutron, which allowed for a more accurate understanding of the atomic nucleus. This discovery was crucial for the development of nuclear fission.
Who discovered the circulation of blood in the human body and published his findings in 1628?
- A Andreas Vesalius
- B Hippocrates
- C Galen
- D William Harvey
Correct answer: William Harvey
William Harvey was the first to describe in detail how blood is pumped around the body by the heart. His work 'De Motu Cordis' replaced the long-held theories of Galen.
The discovery of the 'Expansion of the Universe', showing that distant galaxies are moving away from us, was made by:
- A Edwin Hubble
- B Carl Sagan
- C Albert Einstein
- D Georges Lemaître
Correct answer: Edwin Hubble
Edwin Hubble observed that the redshift of light from distant galaxies is proportional to their distance. This observation provided the first observational evidence for the Big Bang theory.
Who discovered the 'Law of the Pendulum' and used a telescope to discover the four largest moons of Jupiter?
- A Nicolaus Copernicus
- B Isaac Newton
- C Giordano Bruno
- D Galileo Galilei
Correct answer: Galileo Galilei
Galileo Galilei's observations of the Jovian moons provided evidence that not everything in the universe revolved around the Earth. He is often called the 'father of modern observational astronomy'.
Which scientist discovered the 'Photoelectric Effect', for which he was awarded the Nobel Prize in Physics?
- A Max Planck
- B Niels Bohr
- C Albert Einstein
- D Richard Feynman
Correct answer: Albert Einstein
Albert Einstein explained the photoelectric effect by proposing that light consists of discrete packets of energy called photons. This work was a foundational pillar of quantum mechanics.
Who is known as the 'Father of Genetics' for his discovery of the fundamental laws of inheritance using pea plants?
- A Charles Darwin
- B Thomas Hunt Morgan
- C Hugo de Vries
- D Gregor Mendel
Correct answer: Gregor Mendel
Gregor Mendel's experiments between 1856 and 1863 established the rules of heredity, now known as Mendelian inheritance. He identified dominant and recessive traits passed from parents to offspring.
The discovery of the 'Proton' in the atomic nucleus is attributed to which scientist?
- A J.J. Thomson
- B James Chadwick
- C Werner Heisenberg
- D Ernest Rutherford
Correct answer: Ernest Rutherford
Ernest Rutherford identified the proton in 1919 through experiments bombarding nitrogen with alpha particles. His earlier gold foil experiment had revealed the atom's small, dense, positively charged nucleus.
Who discovered that bacteria cause diseases, leading to the development of vaccines for rabies and anthrax?
- A Robert Koch
- B Edward Jenner
- C Antonie van Leeuwenhoek
- D Louis Pasteur
Correct answer: Louis Pasteur
Louis Pasteur was a pioneer of the germ theory of disease and invented the process of pasteurization. His work saved millions by proving that microorganisms are responsible for spoilage and infection.
The discovery of the 'Periodic Law' and the creation of the first Periodic Table of Elements was done by:
- A John Dalton
- B Antoine Lavoisier
- C Dmitri Mendeleev
- D Humphry Davy
Correct answer: Dmitri Mendeleev
Dmitri Mendeleev arranged elements by atomic mass and predicted the properties of elements that had not yet been discovered. His table successfully grouped elements with similar chemical properties together.
Which scientist discovered 'Electromagnetic Induction', which is the principle behind electric generators and transformers?
- A James Clerk Maxwell
- B Michael Faraday
- C Joseph Henry
- D André-Marie Ampère
Correct answer: Michael Faraday
Michael Faraday discovered that a changing magnetic field could induce an electric current in a wire. This discovery fundamentally enabled the large-scale generation and distribution of electricity.
Who discovered the 'Law of Floating Bodies' (Principle of Buoyancy)?
- A Aristotle
- B Archimedes
- C Pythagoras
- D Euclid
Correct answer: Archimedes
Archimedes stated that a body immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced. This is famously associated with his 'Eureka!' moment in the bathtub.
The discovery of the 'Hydrogen' element and its property as a flammable gas was made by:
- A Henry Cavendish
- B Joseph Priestley
- C Antoine Lavoisier
- D Robert Boyle
Correct answer: Henry Cavendish
Henry Cavendish was the first to recognize hydrogen gas as a distinct substance, which he called 'inflammable air'. Antoine Lavoisier later gave the element the name 'hydrogen'.