When you burn wood in a campfire, the following energy transformations take place:

* Chemical energy stored in the wood's bonds is converted into heat energy (thermal energy) and light energy.

* This process is called combustion, a chemical reaction that requires oxygen.

* The heat and light you see and feel are the results of the chemical bonds in the wood breaking and forming new ones with oxygen.

Here's a simplified breakdown:

1. Wood + Oxygen → Carbon Dioxide + Water + Heat + Light

In essence, you're converting the chemical energy stored in the wood into usable forms of heat and light energy.