|St Albans' Science Club||
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.