When you are active, the chemical energy stored in food is converted into mechanical energy.

Here's a breakdown:

* Chemical Energy: This is the energy stored in the bonds of molecules within food. When you eat, your body breaks down these molecules, releasing the energy.

* Mechanical Energy: This is the energy of motion. Your muscles use the released chemical energy to contract and move your body.

In addition to mechanical energy, your body also converts some chemical energy into:

* Heat: This is a byproduct of energy conversion, and it helps to maintain your body temperature.

* Electrical Energy: This is used to power your nervous system and other bodily functions.

So, the chemical energy in food is ultimately transformed into various forms of energy that fuel your body's activities.