thermal insulation - diff thickness

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4 Terms

1
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Method

  1. Wrap 2 layers of insulating material around a beaker, holding it in place with a rubber band

  2. Boil 80cm3 of hot water in a kettle and pour into a beaker

  3. Use a piece of cardboard with a hole ontop as a lid

  4. Put theremometer into the hole

  5. Record the temperature of the water and start stopwatch

  6. Record temperature of water every 3 mins for 15mins

  7. Record results in a table

  8. Repeat steps adding two more layers of insulation each time

2
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Safety

Don't touch beakers when hot

Keep beakers on heatproof mats

Hot water = eye protection

3
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Variables

IV: thickness of material

DV: temperature

CV: volume of water, starting temperature, type of material

4
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Errors

Random: some thermal energy will dissipate into surroundings, human error when reading measurements

Systematic: starting temp must be same