Air pressure, also known as atmospheric pressure is the weight of the molecules pressing on the surface of the earth. It is measured in barometric units. 

Barometers have a chemical called mercury within them.

This chemical helps to read the atmospheric pressure in a room, or in an enclosed place.

water pump using bottle and balloon

It is also the weight of a column of air above a horizontal surface of the unit area. Air pressure constantly changes due to weather systems and altitude.

Low air pressure normally indicates stormy weather, while high air pressure means calm weather.  

Pressure of the atmosphere measured by a barometer is called barometric pressure.

In this video we show you how to perform the air pressure experiments with water for science class students by using the water bottle and balloons.

The detailed video and materials given as below

Materials required:

  • Balloon
  • Small pipe
  • Bottle
  • Scissors

You use the resource/tools page section to find the tips where you can buy these materials used at a reasonable cost.

Detailed Video Show How To Make WATER PUMP FOR SCHOOL SCIENCE PROJECT With Bottle and Balloon

Questions and Answers:

  1. What are the uses of air pressure?

Drills, air hammers, wrenches, under water diving equipment and many other uses are attributed to air pressure.

  • Who discovered the phenomenon of air pressure?

The phenomenon of air pressure was discovered by an Italian Physicist, Evangelista Torricelli in the 17th century.

He further went on to develop a mercury barometer to validate his research and calculate air pressure.

  • Which of the everyday objects we use are associated with air pressure?

Inflating tires, playing musical wind instruments, drinking liquids through a straw, flushing a toilet, blowing a balloon, breathing and various other everyday activities are connected to air pressure.  

Drawing water from a well, using a vacuum cleaner are some other uses.

  • What is a barometer? What is it used for?

A barometer also called as mercury barometer, is nothing but an inverted glass tube assembled in a mercury bath.

The barometer works on the principle of air pressure solely. The mercury rises from the surface due to the pressure and goes higher in the tube, indicating the level of air pressure.

A barometer can be used to measure altitude because atmospheric pressure varies above and below sea level. It was invented in the year 1943.

  • What are the types of barometers?

There are several types of barometers, some of them are mercury barometer, water-based barometer, vacuum pump oil barometer, aneroid barometer, mems barometer, Colin’s patent table barometer, shark oil barometer, etc.

Barometers have been used to forecast weather since the late 19th century.


Air pressure is an essential on the face of the earth, it is concerned with almost all our daily activities either directly or indirectly.

The experiment proves the power of air pressure using simple concepts and easily available materials.

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