My project was called ‘Bubbles in a bottle’ and my question was ‘what quantity of food colouring will make the best lava lamp?’
You can see me explain my project in this video. I found out that 20 drops of food colouring makes the best lava lamp because it gives a better effect when the water is darker.
Mini-Scientist – lava lamp from St Peter’s, Bray on Vimeo.
In my research, I learned that oil is less dense than water so it floats on top of the water. I learned that the Alka-Seltzer mixes with the water to produce bubbles of carbon dioxide, which pushes up through the oil. I learned that there are two types of food colouring. Chemical is made in a lab, organic is made from plants.
My favourite part was when I actually tested my project. Emily from Intel judged my project and I went first. I didn’t mind explaining my project at all. Here are some photos from my project. Thanks for reading all about it!
Oisín