Today we are going to make fireworks in a jar!!
Materials:
- tall glass or jar
- vegetable oil
- food colour
- warm water
- bowl
- fork
Instructions:
- Fill your glass/jar 3/4 of the way full with warm water.
- In a separate bowl, mix 3-4 TBSP. of oil and several drops of different colours of food colouring.
- Use the fork to gently mix the oil and food colouring together.
- Gently pour the mixture into the glass/jar.
- Watch what happens, the food colouring will slowly sink out of the oil and into the water. When this happens, it will expand and begin to mix with the other colours.
The science behind it:
Food coloring dissolves in water but not in oil. Because the oil is less dense than the water, it will float at the top. The colored droplets will begin to sink because they are heavier than the oil. Once they sink into the water, they will begin dissolving into the water (which looks like a tiny explosion).
