required practical - thermal insulators

Question 1

what does part one of the experiment test

Answer 1

comparing how effective different materials are as thermal insulators

Question 2

what does part two of the experiment test

Answer 2

investigating how effective different materials thicknesses are as thermal insulators

Question 3

what are the steps of section one

Answer 3

1. place a small beaker inside a larger one. use a kettle to boil water.
2. transfer 80cm cubed of boiling water into the small beaker
3. use a piece of cardboard to cover the beakers insuring a hole is used for a thermometer. place this thermometer through the hole
4. record the starting temperature of the water and start a stopwatch
5. record the temperature every three minutes for fifteen minutes
6. repeat with insulating materials inside the larger beaker

Question 4

what materials can be used as thermal insulators

Answer 4

bubble wrap, cotton wool, polystyrene balls

Question 5

what is the IV of the first experiment

Answer 5

insulating material

Question 6

what is the DV of the first experiment

Answer 6

the temperature of the water

Question 7

what is the control variable of the first experiment

Answer 7

volume of water, mass of material, starting temp of water

Question 8

what are the steps of section two

Answer 8

set up the same but only one beaker
1.start with 80cm cubed of hot water
2. record the temperature every three minutes for fifteen minutes
3. now wrap two layers of newspaper round the beaker
4. time for fifteen minutes checking every three
5. then repeat with four layers and then six