Equipment:
- 1 cup of room temperature water
- 1/4 cup of oil
- food colouring (optional extra)
- rock salt
- jar
Method:
- Pour 1 cup of room temperature water into your jar
- Add 3 drops of food colouring
- Carefully pour 1/4 cup of oil into your jar, trying not to mix the water and oil
- Add your rock salt
- Observe what happens