Fossil fuels contain stored solar energy and are considered nonrenewable resources. Observe a generator. Describe how electrical energy can be produced from a variety of energy sources and can be transformed into almost any other form of energy. Describe methods for conserving electricity. Understand that material and energy may be changed in form more than once as interactions occur within a complex system.
Heat energy is almost always one of the products of energy transformations.
Recognize that in chemical reactions, energy is transferred into or out of a system. Observe and describe the nature of static electricity using the laws of electrostatic attraction and repulsion, including a discussion of lightning and thunder. Understand the nature of current electricity. Describe an electric circuit using electrical symbols and units of measure. Construct simple series and parallel circuits and show how they transfer electrical energy.