This was by far my kids' favourite science experiment that we did this summer.
You can make this super simple baking soda bottle rocket with the things that you have lying around your house, and with a bit of outdoor space.
Key ingredients: baking soda and vinegar. When they react, they give off gas that fills your plastic bottle and makes it rocket into the air.
Mess warning: this experiment is super messy. Do it outside. And know that it will kill your grass where your bottle blasts off. (We have a rectangle of dried, brown grass right now in the front lawn.)
Materials Needed for a Baking Soda Bottle Rocket
You only new a few things to make a baking soda and vinegar rocket, and most of them can probably be found already lying around your kitchen.
Here's our list.
- baking soda
- empty pop bottle (the 2L is the best)
- pencils and tape to make your bottle stand up
- wine cork the same size as the bottle opening
- napkins to make the baking soda packet
How to Make a Baking Soda Bottle Rocket
This baking soda bottle rocket is super simple to make, though the ratio of baking soda to vinegar, and the timing for putting on the cork, requires a bit of trial and error.
- Tape three pencils (unsharpened works best) to an empty bottle to make 'feet' for your rocket to stand on. These feet will be on the end where the bottle opens.
- Put some vinegar in your empty bottle. We used a 2L bottle (the bigger the bottle, the higher the rocket goes). And we didn't measure the vinegar, but I'd say we used about a cup.
- Wrap up some baking soda in a paper towel to make a baking soda packet. (Again, we didn't measure, but if I had to guess I'd say we used a tablespoon or two.)
- Place the baking soda packet into the plastic bottle (this might take some squeezing).
- Quickly place the cork inside the bottle opening.
- Shake up your mixture (VERY quickly, or it will explode in your hands).
- Stand the bottle up on its feet and watch it explode.
You can make this a true experiment by varying the size of the bottle and the amount of vinegar and baking soda that you use. Take note of how your changes affect the outcome.
Rebecca is a mother of twin boys and a professional blogger. She loves to bake, knit, and run through the forest.