Why do houses have an insulated attic?
What principle does insulation work on?
Why does a vacuum flask have a double-walled container?

In this experiment, beakers of hot water are wrapped in fleece. What device is used to measure temperature?
The temperature is recorded every 2 minutes. What device is used to measure temperature?
Which beaker will transfer heat most quickly?
Which beaker is best insulated?
What is the independent variable?
The layers of fleece trap pockets of air. This makes the fleece a good
To be fair, which of the following should be kept constant?