Question

Describe an activity to show the effect of low pressure and particulate nuclei over water vapors?

Answer 1

Hint: Atmospheric pressure is an indicator of weather. A low pressure system while moving into an area an air of cloudiness, wind and precipitation is led along with it. The atmospheric pressure is measured by an instrument called the barometer.

Complete answer:
As a first step, pour 5-10 mL of water into an empty mineral water bottle. After that close the bottle rigidly and shake the bottle well or keep it in the sun for about 10 minutes.
This will result in evaporation of a major part of water so that the bottle becomes saturated with water vapors and then takes the lighted incense stick.
As next step remove the cap from the bottle and introduce some smoke of incense stick into it and replace the cap tightly. Press the bottle in between the hands and then release the pressure in between them.
Continue to repeat the process 2-3times. The entry of smoke from incense sticks makes the air foggy inside the bottle. The small smoke particles function as nuclei and cause condensation of water vapors over them just as what happens during cloud formation.
 These water droplets are visible on the sides of the bottle which have low pressure when it is released from the bottle. It is just like raining in response to low pressure.

Note: The reason for feeling tired or “down” in rainy weather is the effect of barometric pressure. Lower barometric pressure, which tends to accompany stormy weather, reduces the amount of available oxygen in the air. Drowsiness is one of the first signs of insufficient oxygen.The less dense air which is warmer is squeezed by the cold dense air and lifts the warm air.In a 1000 mb isobar the points above that scale have a lower pressure and points below that isobar have high pressure.