Materials Testing Thermal Insulation Investigation
We need your help!
We've had reports of some kids feeling very cold in the winter. We want to make extra warm and cosy jumpers for them. We need you to carry out investigations to find out which material we should use to make the jumpers.
Thermal Insulation Investigation
The Case
The teacher hates cold tea! A hot cup of tea will go cold because heat travels from a warmer place to a colder place. We need to find a way to slow this process down!
Test the materials to see which one is best to use to make a special thermal cup to keep the teacher's cup of tea warm.
Your Prediction
Which of these materials do you think will be best to wrap around a cup of tea to keep it warm?
- Wool
- Bubble wrap
- Newspaper
- Foil
Find out later if you were right!
Thermal Insulation Investigation
How does it work?
Thermal insulation helps to stop the movement of heat. Heat likes to move from hot zones to cool zones.
We use thermal insulation in our houses. In winter the hot air inside our homes tries to escape outside to the colder air. We fill the cavities in the house walls with materials that are good at keeping the heat inside.
The heat in the teacher's cup of tea, the warmth of our bodies and the warm air in our houses all try to escape in the same way.
Thermal insulation reduces the amount of heat that is lost.
Thermal Insulation Investigation
The Test
All the cups are exactly the same and have exactly the same amount of hot tea in them. Start the clock to see the temperatures drop. How long will each cup of tea take to go cold/reach room temperature?
00:00 minutes
58
minutes
45
minutes
32
minutes
16
minutes
Thermal Insulation Investigation
The Results
Table
| Wool |  |
58 minutes |
|---|---|---|
| Bubble wrap |  |
45 minutes |
| Newspaper |  |
32 minutes |
| Foil |  |
16 minutes |
Chart
Note
The teacher's tea takes 10 minutes to reach room temperature without any insulation.
10 Minutes
You were right!
You predicted that wool would be best at keeping the tea warm.
Was your prediction right?
What can we tell from these results?
