A lava lamp contains a mixture of colored paraffin wax andanother compound that makes the solid was just a bit denser thanthe clear liquid (usually mineral oil or water) in the lamp. Theheat is supplied by a light bulb below the sealed glass bottle ofthe lamp. There is a wire heating coil in the bottom of the sealedbottle to help transfer heat energy into the wax. The top and sidesof the sealed glass bottle are cooler than its heated base.

3. What causes the wax to move from the top of the lamp to thebase of the lamp? (Be specific and complete as you can)

4. What heat-transfer mechanism is displayed by rising andfalling molten wax in the lamp?