The premier destination for fun science projects & experiments for kids grades K-8 since 2010!

BLAST OFF!

Launch a powerful rocket using water pressure

Suitable For

Grade 8

Difficulty

3

Time Required

 <2 Days

Supervision

Required

What’s it about?

A rocket is a very powerful machine which obtains ‘thrust’ or ‘propulsion’ by ejecting a jet of fast moving fluid exhaust from its engine. Rockets are most often launched vertically to try and overcome the force of gravity and travel from the earth out to space. There are many different ways in which a rocket can be propelled, for instance by: air pressure, burning fuel or using water pressure as in the following experiment:

Topics covered

Rocket, Water pressure

What will I need?

  • 2L PLASTIC SODA BOTTLE
  • WINE CORK
  • BICYCLE PUMP (FOOT TYPE)
  • NEEDLE USED TO INFLATE FOOTBALL
  • 2x BRICKS
  • TAP WATER
  • ADULT HELPER

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.

This science experiment works according to Newton’s ‘Law of reaction’. The force or ‘action’ of the compressed air forcing the water backwards sets up an equal force or ‘reaction’ for the bottle going forwards. As the water in the soda bottle is released, the water will spurt out of the mouth of the bottle against the ground and your ‘bottle rocket’ will shoot up in the air. Increasing the air pressure will add distance to your rocket’s flight to a point, but there is a limit to its effect as air will start to leak out through the cork. There is also a limit to the optimum amount of water to be used to launch the rocket. When the amount of water is increased, the weight that the rocket must carry during its flight is also increased so more water does not necessary mean a higher flight.

Like the sound of it?

Why not check out the full worksheet in one of our popular e-books?

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

Experiland e-books contain detailed steps, including illustrations, to complete the science projects from start to finish.

Science project ebooks for kids

Experiland's science e-books contain a diverse range of several hundred of exciting science projects, ideas and experiments.

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!

Get your e-Book!