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Find out how a simple siphon works

Suitable For

Grade 2



Time Required

 <24 Hours



What’s it about?

Even though air is light, there is so much of it that air can exert huge pressure at ground level. Air pushes in all directions at ground level with a force of over 1 kg per sq cm. The weight of the air present in a large room of your house could weigh about 70kg or as much as a person! Use air pressure to make a simple siphon in the following science experiment:

Topics covered

Siphon, Pressure, Air pressure (Atmospheric pressure)

What will I need?

  • 2x BOWLS

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

In this science experiment when you removed your finger and positioned the plastic tube so that the water will fall into the bowl underneath, a steady flow was created from the upper bowl to the lower bowl. The water from the top bowl continuously pours down into the bowl below, through the plastic tube, as the air pressure on the water surface in the top bowl push the water up in the tubing. The weight of the water in the long end of the tubing pulled the water down and into the bowl below!

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This particular science project can be found in any of the following Experiland e-books:

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A project introduction and background, complete listing of required materials, step-by-step instructions on how to carry out the project, why it works, learn more section, as well as a science glossary with all the relevant terms make up each of the all-inclusive science project worksheets in our e-books!

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