Señora George’s 6th grade class made their own lava lamps to study the law of conservation of matter! They added food coloring to the water and then they added oil. The water sits at the bottom because it is more dense than the oil. They put some fizzy tablets to produce carbon dioxide gas. The gas drags the bubbles of colored water up and they go back down eventually, making them look like a lava lamp. They saw the tablets changing forms, although it might look like they disappear, the matter is still there. They found the evidence when measuring the mass (before and after).  Watch their fun video below!