Footprint Futures

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Footprint Futures
The key stage 2 and 3 eco-footprint teaching resource from the Centre for Alternative Technology

Other Warm up – experiment set up Activities

Things needed for this Module...

Solar Power Cans:
  • 4 aluminium drink cans of which:
    • 3 are painted with matt black paint (or blackboard paint) of which:
    • 2 have been insulated with pieces of insulation that is safe to handle – sheeps wool for example covering the back half or two thirds of the can of which:
    • 1 is placed in a clear plastic bag or container  such as a clear 2l bottle with the bottom cut off
  • Thermometer
  • Recording sheet
The Green House:
  • Downloadable activity from CAT (coming soon)
Walk the walk:
Regional plan - energy:
  • Hopefully the mystery guest will be able to stay for this session
  • Maps and aerial floor photo mats if you have them
  • Variety of media for recording
Power Up! – Solar Power:
  • Whole class in groups
  • Small photovoltaic cells, motors, crocodile clips and propellers (available from the Centre for Alternative Technology shop and other education suppliers)
  • Clean floatable materials – eg plastic bottles (with lids), cartons and cups and containers, rubber bands
Power Up – Wind Power:
  • EPK20850
    ‘Wind Kit’ from the Centre for Alternative Technology
    (or a wind power kit from another education supplier)
  • Bits of corriflute plastic and/or other suitable scrap materials like thin card and plastic, scissors, tape.
  • Large electric fan with wide blades, the ones which come in cages designed to sit on the floor are best. (tall bathroom fans with thin blades will not work so well.)
Mystery Guest:
  • Mystery guest from the sustainable energy industry. This could be someone who works to install renewable energy systems, or an engineer who designs them. It could be someone from the council with responsibility for energy efficiency, or someone who promotes energy efficiency. Or it could be someone from a local group such as Friends of the Earth.

Useful Websites

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You will need:

  • 4 aluminium drink cans of which:
    • 3 are painted with matt black paint (or blackboard paint) of which:
    • 2 have been insulated with pieces of insulation that is safe to handle – sheeps wool for example covering the back half or two thirds of the can of which:
    • 1 is placed in a clear plastic bag or container  such as a clear 2l bottle with the bottom cut off
  • Thermometer
  • Recording sheet

<< Module Overview

Module 3: Energy

Solar Power Cans

Solar Power Cans

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A day (or half day if the weather is sunny!) long solar water heating demonstration that you will need to prepare in advance.

What to do:

Explain to the class that they are going to take part in a solar water heating experiment. Ask for volunteers to help you set up the experiment.

You will need to set up – one shiny can, one matt black can, one matt black can which has insulation attached to the back half, one matt black can with insulation attached to the back half and placed in a clear, sealed plastic bag.

Each can is filled with cool water and the temperature taken and recorded. You will need to set the cans on a sunny windowsill with the black sides facing the sun. Take the temperature readings every hour (or more frequently if it is a very sunny day) and record the temperature on the whiteboard. Very shortly (if it is a sunny enough day!) you will see a clear pattern beginning to emerge.

The water will heat more quickly with each of the modifications to the can. Use this to explain how solar water heating panels are made. Ask the pupils which time of year solar water heating is most effective.

!! Warning: if it is a very hot day the can might get too hot to touch !!

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