Science Facts Set-12

  • The age of the Earth is around 4.5 billion years.
  • Antibiotics are substances that kill or inhibit the growth of bacteria.
  • Yuri Gagarin is the first human in outer space.
  • Viruses are active only when they are in their host organisms.
  • There are about 50 species of rats on Earth.
Rats: Observations on the History and Habitat of the City's Most Unwanted Inhabitants
  • Osmium is the densest natural element. 
  • The mean distance between the Earth and the Sun is one Astronomical Unit (AU). One AU is equal to 149,598,000 kilometres. 
  • Valentina Tereshkova is the first woman in outer space. 
  • The components of blood are classified into liquid component-Plasma and Solid component-corpuscles. 
  • Gold is a metal which does not react with steam.
Gold: The Once and Future Money

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