Describe how energy could be converted from chemical energy in a battery to light energy:

According to the law of conservation of energy, energy can not be created nor destroyed but can be transformed from one form to another. Battery is a device that is able to store electrical energy in form of chemical energy. The chemical energy stored in a battery is transformed to electrical energy when wires are connected to the terminals of the battery due to flow of electrons. If the wires are connected to a bulb then the electrical energy in the wires is converted to heat energy and light energy by the bulb.

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )