The energy in the battery is converted to energy.

The energy from the sun is turned into energy in form of glucose (sugar).

The energy at the top of the roller coaster is transformed into energy as gravity pulls the cars down.

The sun gives energy that is converted into energy as food for the insects and birds. The birds also eat insects and this energy is passed onto the larger hawks (merlins). The animals gain their energy from their food and it is lost in the form of or spent as energy.