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Science_Lab_Yellow / Lesson 1: Electrical Energy

Electrical Energy
What will we be learning today?

  • In this lesson, we are going to learn all about what is electrical energy.

What Is Electrical Energy?

  • You know that a battery can produce enough power to light up a light bulb. How does it do this? What is the "power" in a battery? Where does it come from?

  • A battery provides electrical energy. Chemicals inside the battery react. These reactions produce electrons. An electron is one of the particles that make up an atom. Each electron carries energy, giving the battery its "power".

    • When a battery is connected to a light bulb with wires, a closed circuit is formed. A closed circuit means that there is a continuous path for electrons to travel through. The diagram below shows a closed circuit.

  • Electrons flow from the battery to the light bulb through wires. Some of the energy is given up to the wire in the light bulb, called the filament. The filament gets hot enough to glow and give off light. The electrical energy is changed into light and heat.

    • The rest of the electrons flow back into the battery. They can be sent through the circuit again.

    • In some cases the amount of electrical energy in a circuit may not be great enough to light certain bulbs. For example, a flashlight battery could not light up a 60-watt light bulb from a lamp. Electrical energy can be measured by the size of the bulb it can light

    • After a time the chemicals in a battery have all reacted, and no more electrons can be produced. This causes the battery to go dead.

    Let's Review What We Learned Today!

    • Now watch movie "Electricity"

    • Now complete your worksheet!