Learning Objective:
- Investigate which materials are good insulators of heat.
Method:
- Set up your boiling tubes: leave one unwrapped and wrap each of the others in a different material, using elastic bands or tape to hold the material in place. Try to make the different wrappings roughly the same thickness.
- Prepare lids for the containers, made out of the same material as the wrapping, if possible, otherwise made from aluminium foil or cling film.
- Make a hole in each lid which is just big enough for the thermometer to fit through.
- Use the measuring cylinder to pour 20ml of hot water into each boiling tube.
- Put the lids onto the containers, with a thermometer fitted through each lid so that it rests near the bottom of the water.
- Start the stopwatch and measure the starting temperature of the water.
- After 15 minutes, measure the temperature of the water in each beaker.
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