the change in energy of an object over some period of time - power, a closed path that electricity can flow through - circuit, a mechanical device that can connect or disconnect parts of an electric circuit - switch, in an experiment, a group that is kept under normal or ideal conditions while others are changed - control, a device that controls the temperature of a room - thermostat, Why do we need electric circuits? - We need electrical circuits to power the electrical things we use every day, like light bulbs, What is an electric current? - An electric current is a steady flow of charged particles, also known as electrons.,

Lesson 2.2 Electric Circuits - Science Grade 4

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