Lesson 2

An Alarming Idea: Designing Alarm Circuits

It's Electric / Grade 4 / Lawrence, MA

The EIE Curriculum

EiE - An Alarming Idea: Designing Alarm Circuits Lesson 2

Students think like electrical engineers as they engage in an electricity scavenger hunt and think about the energy transformations that occur within electrical appliances they see daily.

Reflection Questions

How do the activities in this lesson build an understanding that the technologies that we use every day use and transform electrical energy?

The activities call on students to reflect on personal experience, analyze a common electrical technology, and observe the transformations that occur.

  • George starts by having students share items they have in their own homes that use electrical energy to work. (0:57)
  • George further challenges his student to name any other forms of energy (light, sound, movement, heat) that might be produced by the technology they chose. (2:42)
  • Finally, George leads an activity where students identify and discuss all the forms of energy that are produced by an electric refrigerator. (6:05)

What activity did George add at the end of the lesson to help students identify the ways that electrical technologies can transform energy?

George provides actual electrical technologies for students to observe and analyze in terms of energy transformation.

  • One group of students uses their senses to observe the mechanical, sound, and heat energy outputs that are produced by an electric pencil sharpener. (8:30)
  • Students in another group observe the heat, light, and mechanical energy outputs from a motorized model of the sun and the moon. (9:00)