Using energy

Energy exists in many different forms.

Chemical energy - is energy stored in fuel (including food). This energy is released when chemical reactions take place.
Kinetic energy- is the energy of a moving object.
Gravitational potential energy - is the energy of  an object due to its position.
Elastic energy - is the energy stored in the springy object when we stretch it or squash it.
Thermal energy - Of an object is energy due to its temperature. This party because of the random kinetic energy of the particles object.

Energy can change (transform ) from one form into another