Discover which insulator is the best for your house.
To see which is the best insulator whilst recording its temperature every four minutes.
- 6 cans
- woolen cloth
- cotton wool
- can holder
- foam blister
- 6 thermometers
- hot water
- a funnel
- some milk cartons cut in half to hold the insulator with the cans.
- Put the can inside the cartons with the insulators.
- Fill the cans with hot water(300ml).
- Put the thermometers in each can and record their first temperatures.
- Keep recording a temperature every 4 minutes until u get to 24 minutes.
- Work out the temperature change.
TEMPERATURE IN *C
Foam Can Holder
After the 24 minutes the can with no insulators got the lowest temperature of 48*C and the woolen cloth and cotton wool insulators got the highest of 52*C. We could have used something with a smaller area than a milk carton to keep the insulators packed together with the can.
The can with no insulator had the highest temperature change and the Cotton wool had the lowest.
A) Name 3 methods by which heat can be transferred.
Conduction, Convection, Radiation.
B) Which methods of heat transfer are reduced by the insulators used?
Conduction and Convection.
C) Why did one of the containers have no insulation?
To test if that will work.
D) When reading the thermometer, how did you reduce parallax error?
By looking straight ahead at where the alcohol line has stopped.
E) What was done to make sure that the comparison of materials was fair?
A milk carton was added so the materials will be squished together with the cans of hot water.
F) How could the experiment be improved?
By getting something with a smaller area than a milk carton to squash the cans and the insulators closer together.
G) If you were designing a house, which insulators you investigated would you put in the ceiling to reduce heat loss from the house?
I would choose the Cotton wool because it had the highest temperature after 24 minutes to keep the house warm and it had the lowest temperature change so it keeps my house warmer on cold nights.