2. ENERGY TRANSFORMATIONS

There are various forms of energy.

A battery contains chemical energy which is transformed into electrical energy.
Then a ligthbulb transforms the electrical current into luminous and thermal energy.
The chemical energy in our muscles can be transformed into mechanical energy in order to move objects.

Photovoltaic solar panels transform luminous energy from the sun into eletrical energy.
Chemical energy can be stored in fireworks when its explode the chmical energy is converted into ligth, heat,sound and mechanical energy.

A kitchen mixer converts electrical energy into kinetic energy.Some energy is also lost as heat.
Internal combustion engines transform the chemical energy of fossil fuels into thermal energy.This thermal energy is transformed into motion but some is lost as heat.Some energy is also lost as sound.

In stars the nuclear energy of atoms is transformed into very intense luminous and thermal energy.