Question Index

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• Using fertilizers in farming is an example of
  Using fertilizers in farming is an example of
• The life supporting zone of the earth is
  The life supporting zone of the earth is
• Depletion of ozone molecules in the stratosphere is due to
  Depletion of ozone molecules in the stratosphere is due to
• On moon the temperature ranges from -190°C to 110°C. This is due to
  On moon the temperature ranges from -190°C to 110°C. This is due to
• Life cannot sustain on Mars and Venus because major component in atmosphere is
  Life cannot sustain on Mars and Venus because major component in atmosphere is
• Molecules of proteins contain
  Molecules of proteins contain
• Atmosphere maintain the temperature of earth because
  Atmosphere maintain the temperature of earth because
• Nitrogen fixation can be done by
  Nitrogen fixation can be done by
• Greenhouse gases are
  Greenhouse gases are
• Burning of fossil fuels add
  Burning of fossil fuels add
• The micro-organisms which help in formation of soil is
  The micro-organisms which help in formation of soil is
• Sound waves in air is an example of ——————
  Sound waves in air is an example of ——————
• The number of compressions or rarefactions per unit time gives ———–
  The number of compressions or rarefactions per unit time gives ———–
• The phenomenon where a sound produced is heard again due to reflection is called ———–
  The phenomenon where a sound produced is heard again due to reflection is called ———–
• When a body vibrates, it compresses the air surrounding and forms a high-density area known as —————-.
  When a body vibrates, it compresses the air surrounding and forms a high-density area known as —————-.
• Sound travels through which medium?
  Sound travels through which medium?
• Is the law of conservation of energy applicable to sound waves?
  Is the law of conservation of energy applicable to sound waves?
• The distance which compression or a rarefaction travels per unit of time gives————-
  The distance which compression or a rarefaction travels per unit of time gives————-
• State true or false: Sound does not need a medium to propagate.
  State true or false: Sound does not need a medium to propagate.
• Mexican wave in a stadium is an example of
  Mexican wave in a stadium is an example of