# Ten science experiments you can do with a plastic bottle – Part 2

We are back with more bottle science experiments! How did you get on with the first five we shared last week? We have had plenty of feedback from people who tried them out and really enjoyed them so here are five more bottle science experiments to try!

You can find experiments 1 to 5 in this post!

REMEMBER: YOU NEED ADULT SUPERVISION FOR ALL THESE EXPERIMENTS

#### 9. Bottle Rocket Experiment No. 1

This video doesn’t include the science of how it happens, so here it is! As you know from previous experiments… when we mix the vinegar and the bread soda the react rapidly making a salt, water and Carbon Dioxide gas. Gases usually take up more space than liquids or solids so the sudden production of Carbon Dioxide gas causes a rapid increase in pressure inside the bottle. The gas wants to break out of the confined space within the bottle but the cork is in the way. With enough pressure the cork is forced off and the gas escapes.

Newton’s Thirds Law of motion states that…

Every action has an equal and opposite reaction!

This law is what makes the rocket shoot into the air. The first ‘action’ is the cork shooting off the bottom of the bottle; this produces the ‘equal and opposite’ reaction of the bottle rocket shooting off in the opposite direction! It all follows the laws of physics!

#### 10. Bottle Rocket Experiment No. 2

This rockets follows the exact same law as the previous experiment, except this time the pressure is built up by the air we pump into the bottle. This pressure eventually builds up forcing the cork, and the water, out of the bottle and the rocket is then propelled off in the opposite direction, shooting up into the sky.

And there you have it! Ten fantastic experiments to do with a plastic bottle. If you missed the first five you can find them here! Please let us know what you thought of this series and how you got on. If you like these video experiments and would like some more just let us know in the comments below and we will get working on a new series straight away!

ENJOY!

#### nao

Science blogger and writer; Owner of Dr. How's Science Wows; Mother of three junior scientists who have taught me that to be a great scientist you need to look at life through the eyes of a child!