Energy is present whenever there are moving objects, sound, light, or heat.
Energy can be transferred from place to place by electric currents and used to produce motion, sound, heat, or light.
How is energy transformed to produce heat, sound and light?
What happens to energy when it is transferred? Where does it go?
How do electrical currents / circuits work?
What changes occur when objects collide?
How can we prove that energy is present wherever there are moving objects, sound, light or heat?