Relative Humidity and Cloud Formation
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Questions and Answers

What occurs when the relative humidity reaches 100%?

  • The air can hold more water vapour.
  • The air is considered saturated. (correct)
  • Dew point temperature is reached. (correct)
  • The temperature begins to rise.

    • How does temperature affect relative humidity?

  • Temperature does not affect relative humidity.
  • Higher temperatures lead to lower relative humidity. (correct)
  • Higher temperatures lead to higher relative humidity.
  • Lower temperatures lead to higher relative humidity.

    • What is the process that leads to cloud formation when warm air rises?

  • Heat causes the water vapour to disperse into the air.
  • Cooling of air causes condensation at lower altitudes. (correct)
  • Dust particles act as barriers to water vapour.
  • Warm air expands without changing prior humidity levels.

    • What is absolute humidity a measure of?

    <p>The actual amount of water vapour in the air.</p> Signup and view all the answers

    What happens to water droplets during the cloud formation process?

    <p>They collide and merge to form larger droplets.</p> Signup and view all the answers

    Study Notes

    Relative Humidity

    • Relative humidity (R.H.) is the percentage of water vapor in the air compared to the maximum amount it can hold at a given temperature.
    • Absolute humidity refers to the actual amount of water vapor in the air, measured as a number.
    • When air is saturated, the R.H. reaches 100%.
    • Dew point temperature is the temperature at which the air becomes saturated, resulting in a 100% R.H.

    Temperature and Relative Humidity

    • There is an inverse relationship between temperature and relative humidity.
    • As temperature increases, air expands and can hold more water vapor.
    • The same amount of water vapor in more air leads to a lower R.H..

    Cloud Formation

    • Heat causes water to evaporate, creating water vapor.
    • Warm air carrying water vapor rises, causing it to cool rapidly, lowering the air temperature.
    • As the air cools and rises, the R.H. increases.
    • When R.H. reaches 100%, the air becomes saturated, causing the water vapor to condense into liquid water.
    • Water droplets form around dust particles in the air.
    • These droplets collide and merge together, a process called coalescence, forming clouds.

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    Description

    This quiz covers the concepts of relative humidity, its relationship with temperature, and the processes of cloud formation. Understand the importance of relative humidity in weather patterns and its connection to air saturation and dew point. Test your knowledge of how temperature influences humidity levels and cloud dynamics.

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