Because modern society places large demands on non-renewable sources of energy, it is essential that energy is used wisely. Alternative sources, especially renewable ones, must also be developed if we wish to sustain our present standard of living and ensure adequate energy supplies for future generations. Students need to understand the improtance of this prolem and learn how to conserve energy.
Building on their previous learning about mechanisms and systems, students will deepen their understanding of how devices use energy. By designing, constructing, and operating their own devices, they will learn how energy is transferred from one system to another. In addition, they will expand their knowledge of the different sources of energy and classify them as renewable and non-renewable.