Parents, Educators & Engineers

# Electric Highway

English PDF (1.6MB)

Design and build a circuit: an "electric highway" that connects a battery and buzzer at least three feet apart using four types of materials.

## MATERIALS

• AA battery
• AA battery holder (optional)
• Buzzer
• Wire strippers
• Scissors
• Duct tape

Choose at least four conductors:

• Aluminum foil
• Electrical wire
• Pennies
• Washers
• Paperclips
• Binder clips
• Paper
• Rubber bands
• Paper cups
• Cardboard tubes
• Twist ties

## BRAINSTORM

• How can you get electricity to travel three feet?
• Which materials are conductors?
• How will you know electricity is flowing?

NOTE:

• A circuit is a path along which electricity can travel. A conductor is a material that electricity can flow through.
• When all parts of the circuit are connected, electricity flows from the battery to the buzzer and back to the battery...turning on the buzzer. A break in the connection stops electricity from flowing.

## DESIGN AND BUILD

• Tape the battery to a table but keep the buzzer loose so you can keep making the circuit longer. When it reaches three feet and uses four conductors, you've done it! HINT: Test your highway as you build.

## TEST AND REDESIGN

### Is your buzzer not buzzing?

• Are all the materials you used conductors?
• Is there good contact between all parts of the circuit?

NOTE: The buzzer only works when its red wire connects to the positive (+) side of the battery and its black wire to the negative (-) side.

## INSIDE THE ENGINEERING

You made electricity flow over a long distance—just like engineers do. By connecting conductors together, you can power a computer, a house, or a city!

## KEEP BUILDING!

Make your electric highway even longer by adding more conductors. See how far you can make electricity flow!