Cool Lava Lamp Experiment!

In science elective we did a cool lava lamp experiment. How did that turn out?  The oil stayed above the water because the oil is less dense than water. The oil and water do not mix because of “intermolecular polarity.” Molecular polarity basically means that water molecules are attracted to other water molecules. They get along fine, and can loosely bond together. This is kind of like when magnets are attracted to each other. Oil molecules are attracted to other oil molecules, they get along fine as well. But the structures of the two molecules do not allow them to come together. When you added the tablet piece, (aspirin) it sank to the bottom and started dissolving and creating a gas. As the gas bubbles rose, they took some of the colored water with them. When the blob of water reached the top, the gas escaped and down went the water. If we shone a torch light through the cup, it made a nice glow making a lava lamp! All you need for this experiment is some water, (If you want you can put some food colouring in it) some cooking oil and one aspirin tablet.