The law of conservation of energy states that energy is neither created nor destroyed — but is transformed from one form to another. In this lesson, Dale Bennett will touch upon how energy is stored, carried, and transferred. Energy can be stored in chemical batteries, magnets, and nuclear fission. To be useful, this energy needs to be transferred to some other form. This brings energy carriers into play, which carry this energy through mechanical, electrical, thermal, or radiative means. The battery powered drill is a classic example of energy transfers. Energy transfers can be effectively represented using Sankey diagrams. It is pertinent to mention that although most of the energy is converted to useful energy, a small amount is wasted as environmental heat.
The video satisfies the 4-PS3-4 requirement of fourth-grade science proficiency.
Students who demonstrate understanding can: 4-PS3-4. Apply scientific ideas to design, test, and refine a device that converts energy from one form to another.