1. When a lion eats a zebra and then uses the energy from the zebra to run, the lion's body converts **chemical energy -> mechanical energy**. The energy stored in the chemical bonds of the zebra's tissues (from its food) is converted into mechanical energy as the lion's muscles contract and allow it to move.
2. In gym class, as you run a mile, your body undergoes the following energy transformation: **chemical to mechanical and thermal**. The chemical energy stored in the food you've consumed is converted into mechanical energy as your muscles propel you forward during the run. Some of this energy is also transformed into thermal energy due to the heat generated by your muscles working.