Lesson 2: Current Electricity

Look at the pictures below and consider: What do you know?

• I know the pictures show a historical event.

• I know the pictures depict a scientific process.

• I know the pictures illustrate a famous artwork.

• I know the pictures represent a mathematical concept.

Look at the pictures below and consider: What do you notice?

• I notice a pattern.

• I notice a color scheme.

• I notice a specific object.

• I notice nothing unusual.

Look at the pictures below and consider: What do you wonder?

• I wonder about the history of the objects in the pictures.

• I wonder about the location where the pictures were taken.

• I wonder about the people in the pictures.

• I wonder about the purpose of the pictures.

You hear a student say "I think the electrons get used up by the light bulb. They are changed to light." Do you agree or disagree with the statement?

• Agree, because electrons are converted into light energy.

• Disagree, because electrons are not consumed; they flow through the circuit.

• Agree, because the light bulb needs electrons to produce light.

• Disagree, because electrons are destroyed in the process.

Items that use electrical energy are called ________. This circuit has a ________.

• electrical devices, power source

• electrical devices, switch

• electrical devices, resistor

• electrical devices, conductor

Source of electrical energy. Could be a ________ or a household ________.

• battery

• generator

• solar panel

• wind turbine

Electrons are carried through the circuit along ______________.

• wires

• pipes

• tubes

• channels

Most circuits have a device to control the flow of current. This is a ______________.

• Switch

• Resistor

• Capacitor

• Inductor

In which direction will the electrons flow in the diagram to the left?

• From left to right

• From right to left

• From top to bottom

• From bottom to top

What is the symbol for a Battery (source) used for in a circuit?

• A pair of parallel lines of different lengths

• A zigzag line

• A circle with a cross inside

• A triangle pointing to a line