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1A biology

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  • How many layer of the atmosphere are there?
    5
  • Why do people get altitude sickness?
    The atmospheric pressure decreases as the altitude increases
  • What two things created the atmosphere?
    Volcanic eruptions and photosynthesis
  • What is atmospheric pressure?
    The weight that air exerts on the earth
  • Which gas is the most abundant in the troposphere?
    Nitrogen - 78%
  • What causes wind?
    It is because the air is in constant motion - the earth is rotating and revolving
  • What is condensation?
    When water vapour cools and becomes a liquid
  • Name 2 of the layers of the atmosphere
    Exosphere, thermosphere, mesosphere, stratosphere, troposphere
  • What is the atmosphere?
    Thin layer of gases surrounding our planet
  • Names 3 gases in the atmosphere
    Carbon dioxide, nitrogen, water vapour, oxygen, methane
  • What is atmospheric humidity?
    The amount of water vapour in the atmosphere
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