We will each post an experiment on alternate Mondays so keep an eye out for the next one. If you have any ideas you would like us to incorporate just let us know.
Build a Volcano
We did this for nursery homework a few months ago and it was a big hit with my son and his class. It can be a bit messy though, so I’d do it outside or in the kitchen.
We looked at some pictures of volcanoes on the internet first and then I explained that we couldn’t recreate an actual eruption, but we could cause a chemical reaction that would look like a volcano erupting.
an empty water bottle ( we used a 500ml one )
something to make the volcano with. We used some old modelling clay, but you could make your own play doh, or use soil if doing it outside or even papier-mache.
2 spoonfuls of baking soda (bicarbonate of soda )
1 spoonful washing up liquid
a few drops of red and yellow food colouring
30 ml vinegar
What to do
Mould your volcano around the water bottle. If doing it in the kitchen maybe put it in a baking tray to catch the mess. You can make the volcano as simple or as fancy as you like!
Add everything except the vinegar to the water bottle.
Stand back, get ready……add the vinegar and watch the eruption! If it doesn’t work so well add a bit more washing up liquid and vinegar.
This video is not hugely explosive. I’m sure you can do better!
If you want the science behind it:
The bubbles in the washing up liquid are from carbon dioxide formed by the reaction between baking soda ( sodium bicarbonate ) and vinegar ( acetic acid ).
Please let us know how you found todays experiment!
Emma and Kerry