# Bottle Rocket

This experiment demonstrates how a build up in pressure can launch a rocket.

As we pump air through the water the pressure inside the bottle builds up until the force of the air pushing on the water is enough to push the cork out of the end of the bottle. The water rushes out of the bottle in one direction whilst the bottle pushes back in the other. This results in the bottle shooting upwards.

## How to make a Bottle rocket

### What you need

• an empty plastic bottle
• cardboard made into a cone and  4 fins
• a cork
• a pump with a needle adaptor
• water

### Instructions

• Push the needle adaptor of the pump through the cork, it needs to go all the way through so you might have to trim the cork a little bit.
• Decorate the bottle with the cone and fins.
• Fill the bottle one quarter full of water and push the cork in tightly.
• Take the bottle outside  and connect the pump to the needle adaptor. Ours wouldn’t stand up on the fins so we rested it on a table, but if you make some strong fins it should stand up by itself.
• Pump air into the bottle, making sure all spectators stand back, the bottle will lift off with force after a few seconds.

### Warning!

Please make sure an adult is around as the rocket takes off very suddenly and forcefully as you can see in this video clip. Do not approach the rocket once you have started pumping even if it looks like nothing is happening.

### The Science bit

Space rockets work in a similar way to the bottle, but instead of squirting water they burn fuel to make a powerful jet of hot gas. The force of the gas  downwards pushes the rocket upwards.

Isaac Newton worked out the three laws of motion which describe how all objects move. The third law says:

‘for every action there is an equal and opposite reaction’

This is demonstrated by the bottle rocket.

Did you know we have a book available? Rocket Science is full of easy and exciting space themed activities perfect for kids of all ages. Click the image to find out more.

We recently tried a brilliant rocket kit from The Consortium which was VERY easy to use. We would definitely recommend it!

### Extension Activities

Try one of these other easy air pressure experiments, including making a fake lung, a barometer and a coin popper!

We also love this collection of fun and easy garden games.

Did you know we have an Early Years book available to buy too?

1. maria

What a lovely project! We’ll give it a go too, thanks for sharing:)

2. Amanda

This is so fun! I was out searching for kid’s crafts to feature on Fun Family Crafts, a site similar to Craftgawker (but kid’s crafts only) when I came across this. I would love it if you would submit it! http://funfamilycrafts.com

3. Sherry and Donna

Oh WOW Emma and Kerry this is AWESOME!!! We will definitely be trying this amazing experiment out …. all for the children’s benefit of course (cough, cough).
Donna 🙂 🙂

4. Laura

This is so much fun, I used to do it with my 5th grade class. I’d love for you to stop by http://www.laughloveandcraft.com and link up to my Share the Wealth Wednesday Link Party! I’m your newest follower!

1. ScienceSparks

Thank you. We are very excited by it, and can’t wait to add to our growing collection of experiments!

1. ScienceSparks

It was brilliant! I’m so glad you liked it. 🙂

1. ScienceSparks

It was quite scary! We were lucky it didn’t go out of the garden! x

5. Mom to 2 Posh Lil Divas

yay, this is fabulous – how fun & educational! Thanks for sharing on the Sunday Showcase!

1. ScienceSparks

Thank you!

6. Ticia

That looks awesome. I learned the hard way not to go near projects like that after I did……. That was an unpleasant chemical burn and took a few days to stop stinging.

I’ll have to see if we have a hand pump anywhere.

1. ScienceSparks

ouch, sounds painful! The rocket was fantastic though.

7. maryanne @ mama smiles

The little blue cone makes the rocket look so much more exciting!!!

This is a great experiment that I think any kid would enjoy! Thanks for sharing with Learning Laboratory at Mama Smiles 🙂

8. Alisha

We used to do this…so fun!

1. ScienceSparks

its great and so easy!

1. ScienceSparks

Thank you, my children thought it was fantastic

9. maggy, red ted art

Love love love this experiment! Such fun! And love the Science Sparks look!

Thank you for sharing on Kids Get Crafty! Great to see you there!

Maggy & Alissa

10. Cerys @ Rainy Day Mum

This looks so much fun I can remember making them with my physics class. J would also love it. I love the new look to science sparks.

Thank you for linking up to Tuesday Tots

1. ScienceSparks

We loved it!

11. Space Exploration Experiment Kit | Science Sparks

[…] The first thing Z wanted to try was the rather exciting looking rocket.  It consisted of a small base in which water could be placed, and a rocket shaped ship.  It looked a lot neater than the Soda pop bottle and foot pump contraption we made last year. […]

1. ScienceSparks

oh no. what happened?

12. Kids crafts - rocket

[…] space and science in general. We’ve done a few science posts on science sparks, like this rocket, which he […]

13. Pauline

WOAH! Look at that rocket go! Love this! I’ll be featuring this post as part of my Earth Day Activities for Kids: Upcycling roundup from the Weekly Kids Co-Op. xoxo P

1. ScienceSparks

oh wow, thank you.

14. Whitney Coy

SheKnows.com is excited to include a photo from Science Sparks on our site! In our article we will provide a link back to your blog post. Please contact us if you have any questions or if you would prefer that we not use your photo.

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[…] of course no trip to outer space is truly acheivable without taking your very own rocket ship! This activity at Science Sparks is a great way to learn about the science of pressure and rockets. But if getting messy isn’t […]

17. retired

There is a little air leaking out when flip the bottle over. Is there a certain cork or needle I can use? Right as the bottle fills up with air it starts to leak. any advice would be appreciated.

Bob

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[…] Keep cool and test your math skills with our water squirter math activity Make a your very own bottle rocket with Science Sparks How far can you launch something from your homemade catapult, inspired by Frugal […]

19. Britt

Hi–what a fun craft! Would this work with different sized plastic bottles–such as a 16oz plastic soda bottle? Thanks!

20. Water rocket | otrops.com

[…] fins and a nosecone out of a cereal box and glued them on with a hot glue gun (an idea we got from Science Sparks. This definitely made the bottle look more rocket-like, but the didn’t last for more than a […]

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[…] In the Alka Seltzer experiment we saw how a force pushing downwards launches a rocket. We can see this on a bigger scale in this water rocket experiment from Science Sparks. […]

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[…] Tails Make a Bug Hotel by Red Ted Art Play some Hula Hoop Games by Learn Play Imagine Send a Bottle Rocket high in the sky by Science Sparks Stomp on Shadows by Motherhood on a Dime Alphabet Activities […]

23. yccc_dudpy6_

This is a awesome experiment…

1. bob

not at all

24. Erick B

What size cork would be best to use for this project?

25. Wasim Akram

Not Very Good

26. Sarah Cowdry

I haven’t tryed it yet but I bet it will be cool

27. Charl

I heart kitschy stuff. (ooh dang spelling error) I enjoy how quriky your tim horton pants are. Grr my brain is;&n39#t working otherwise I would totally have a more creative comment.

28. rs

bottle rocket?

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