Tuesday, 21 September 2021 09:27

Properties of Matter - Class 6 Science Revision Notes

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Composition of Air

Air is a mixture of gases

Air mainly consists of :

  • Gases
  • Water vapour
  • Dust particles

Components of Air

Uses of Oxygen

  • Breathing ( Respiration)
  • Germination
  • Burning ( Combustion)
  • Rusting.

Uses of Carbon Dioxide

  • Photosynthesis
  • Preserve soft drinks
  • To make fire extinguishers
  • Used in baking
  • Used in making dry ice.

Uses of Nitrogen

  • Used by plants to make proteins
  • Used to preserve semen
  • It is taken in through the roots as nitrates. Leguminous plants are able to convert nitrogen to nitrates.

Uses of Inert Gases

  • They include Argon, Neon, Helium and Krypton
  • Used in electric bulbs and light tubes
  • Used in coloured advertising signboards.
  • Used in hot air balloons.

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