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Build a lighthouse

What's it all about?

We haven't got time to build a real lighthouse, but given one hour and some simple materials, we can build a model one. However, this needs team work and vision, as the winning lighthouse will not only be tall, but it will have a working light and it will have an elegant design.

Are you ready for the challenge?

Student notes

There are two parts to the lighthouse activity:

Working as a group, you have one hour to design and make a lighthouse using the materials provided. When the time is up, your lighthouse will be tested and also assessed for its design and strength.

Take care: the winner is not necessarily the tallest lighthouse, but the lamp must be at least 90 cm above the base.

Planning the lighthouse

You should spend about 10 minutes on this stage. During the planning time you are allowed to:

  • handle the materials
  • make measurements
  • making drawings and plans

You are not allowed to fold, join or fix anything together at this stage.

Your planned lighthouse must be:

  • free-standing (not stuck to the bench or floor, or resting on anything)
  • at least 90 cm high
  • fitted with a working lamp at the top
  • controlled by an on/off switch
  • made so that the battery is no more than 4 cm from the base of the lighthouse

Building the lighthouse

You should spend about 45 minutes building your lighthouse. It often helps if you have also thought about assigning jobs to each person in the group as part of your planning.

Make sure you allow sufficient time to test your lighthouse before judging takes place.

metal drawing pins

 

You will need to make a complete circuit including battery, switch, lamp and conducting wires. Remember that aluminium, like all metals, is a good conductor of electricity.

At least three different designs of switch are possible using the equipment provided.
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Teacher notes

There is ample paper and sticky tape, so there are only two main problems:

  • making a tall enough tower that will not fall over
  • making a circuit from the battery at the bottom to the bulb at the top.

The best designs seem to resemble a tripod with legs of rolled paper (these work better if connected together near the base to stop them spreading). Students usually quickly tumble to the idea of using the foil as one of the conductors in the circuit, and at least three designs of switches can be made from the equipment provided.

Technician notes

Per group of students:

12 × sheets of A4-sized paper
1 × insulated electrical wire, approximately 1 m long
1 × strip of aluminium cooking foil, just over 1 m long
1 × MES lamp with batten lamp holder
1 × battery
2 × metal drawing pins
1 × clothes peg
1 × roll of sticky tape
1 × one-metre rule
1 × 30-centimetre rule
1 × pencil
1 × pair of scissors
1 × small electrical screwdriver (suitable for the screws in the lamp holder)
assorted elastic bands

batten lamp holder and MES lamp