Requirement

3. Energy efficiency: take one everyday system apart in four ways

Required

Explain a common example of energy moving through a system to produce a useful result, then answer all four parts below about that same system.

Note. All four parts are about ONE system, the common example you explain at the start. Choosing that example well makes the four parts straightforward; choosing something with no interesting losses makes 3(d) hard to answer.

What this is made of

3(a). Which parts of the system the energy movement affects
3(b). The system's primary source of energy
3(c). The useful outcomes of the system
3(d). The energy losses of the system

Where this step comes from

Energy Merit Badge Requirements (Merit Badge Hub, last modified 2025-12-15), Requirement 3

Notes and warnings

What this is made of

Where this step comes from