One of the students was inspired by a video they saw on youtube where you could push a pin into a balloon where is was covered by sellotape.
Using this as a basis for the weeks experiments we looked at what pops a balloon and the changes you can do to stop it from popping. We tried the sellotape first and we were able to push three pins into the balloon!
We then made a mat of pins to find out what happened when we pushed a balloon on it.
One of the best things about doing these experiments is the fantastic variations the students come up with to test the first theory. Amira wondered what would happen if we made another bed of nails and squashed a balloon between the two. Check out the video below to see what happened...
I haven't updated the blog in a while. This isn't because science club hasn't happened, it's that the experiments have been exciting and involved and I've forgotten to take out the camera in time.
Fortunately my science helpers have been reminding me and have captured our last few experiments.
Over the last few weeks we have been looking at alkalines and acids and how they react. We created an acid-base indicator from red cabbage. You blend red cabbage leaves with a bit a water and then strain it. It will be a bright purple. When you add the cabbage juice to other liquids it will change colour depending on its acidity.
After learning that all liquids have different alkaline and acid levels we did one of the most well-known and fun experiments mixing the two - baking soda and vinegar.
For this variation we mixed the two in an old film canister and watched what happened. The explosion is impressive and the film canister rocket shoots 5 metres in the air!
The students loved watching the rocket and even started coming up with their own variations - is it more important to have more vinegar or baking soda?
As we didn't catch our own rocket on video here is a youtube clip of the experiment of what we did.