Electric circuit is used by electrons from a current source or voltage power.
The standard return for electrical and electronic circuits is the earth ground. When an electrical or electronic device fails, it may open the return circuit to the earth ground.
We frequently use analogies to teach about electricity and electric circuits and have found them to provide an evocative method to bring this topic to life. The topic of electricity has the added difficulty of having specialised and often unfamiliar vocabulary which students have to learn; use of analogies helps students learn these new words.
This open hands-on model building effectively combines theoretical and practical STEM skills. Analogies are ideal in supporting and complementing this practical model making and reinforcing the principles taught.