LAVA LAMPS!!!!!!

Lava lamps were originally called Astro Lamps and were created by Edward Craven.   The lava lamp contains wax, water, and other contents that are all combined together with a secret formula.  How does it work you ask?  Well as the lamp heats up the wax in the lamp melts, and as it melts it becomes liter and it floats to the top.  But how does it come back down?  As it moves away from the light source it cools and becomes heavy once more and falls back down. 

Home made lava lamps are a little different.  Instead of having a heat source, we use salt or Alkaseltzer tablets to make the water bubble. When you combine the water and the oil they don't mix because the oil is hydrophobic and the water is heavier than the oil so it will sink to the bottom.  If you wanted to you could add food coloring to your lava lamp but this will only effect the water because it is hydrophillic.  When you put in the Alkaseltzer tablet you will notice that the water starts to bubble.  This is because the water is causing the tablet to release all of its oxygen and it all goes to the top. This is how home made lava lamps are made.