thermal insulation - diff materials

Method

1. Put small beaker inside a larger one

2. Use a kettle to boil 80cm3 of water and pour into the small beaker

3. Use a piece of cardboard as a kid for the large beaker - poke a hole in it for the thermometer

4. Put the thermometer through the hole in the lid

5. Record the temperature of the water and start the stopwatch

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

7. Record your results in a table

8. Repeat steps using different materials each time to fill the space between the large and small beaker

Variables

IV: type of material

DV: temperature

CV: volume of water, thickness of materials, starting temperature

Errors

Random: some heat will dissipate into surroundings, human error in reading measurements

Systematic: if starting temp is different it'll affect results

Safety

Don't touch beakers when hot

Keep beakers on heatproof mats

Hot water = eye protection