This STEM project is a favorite from our quarantine days of virtual programming.
Large jar (24 oz. spaghetti sauce jar or a large mason jar)
Water - 2 1/2 cups water (or until it reaches 3/4 of the way up the jar)
Oil - 1/2 cup
Sprinkle in as much salt as necessary but you'd need about 1/4 cup total
Food coloring (optional)
Pour water 3/4 to the top of a mason jar. Stir in optional food coloring.
Pour oil into jar. Allow water and oil to separate.
Sprinkle salt into jar. Watch the reaction occur and make observations.
Watch this project at: https://www.youtube.com/watch?v=v3qhs9SW-RA