A lava lamp contains a waxy substance and water which do not mix and a light bulb at the base as the bulb heats the waxy substance it rises near the top of the lamp the waxy substance cools and falls explain why this happens

Explanation:

This happens because of the density variation as the waxy substance is heated in the lava lamp.

Density is one of the intensive property of matter that often times varies with temperature changes.

One of this clear cut examples is seen in water and ice. Ice is less dense than water but they are made of the same chemical substances.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

answermeridional ;