Yesterday we did a science experiment were we made a lava lamp and we changed one thing about it and answer a question we made up. My groups question was how many fizzy tablets did it take to over flow the test tube because when you put the tablet in the top starts to foam. First we put the normal amount you would put in a test tube which was a quarter of a tablet and that didn't over flow. Then we put in half a table and it still didn't over flow but we ran out of time in the lab and we had to pack up. But i think it would take one and a quarter tablets to over flow the test tube.