Do you know what happens when you mix oil and water? The oil floats on top of the water because it is less dense. Now add some salt and VOILA! You get your very own lava cup! Because salt is heavier than oil, it sinks into the water pulling the oil with it, and when it dissolve…up goes the oil. This gives a real cool effect. Check it out!
activities ,education ,engineering ,experiments ,Fun ,girls ,Girlstart ,hands-on ,kids ,math ,science ,STEM ,technology