Effectiveness of Materials as Thermal Insulators - PRACTICAL Flashcards
Energy (13 cards)
What is the first step in the experiment described?
Boil water in a kettle
What should you pour the boiled water into?
A suitable container (e.g. a beaker with a lid)
What should be measured after pouring the water into the container?
The mass of water in the container
What instrument is used to measure the initial temperature of the water?
A thermometer
How long should the container be sealed before measuring the final temperature?
Five minutes
What should be done after measuring the final temperature of the water?
Pour away the water and allow the container to cool to room temperature
What variable is changed in the repeated experiment?
The material used to wrap the container
What should be kept constant during the experiment?
The mass of water and initial temperature
The lower the temperature difference indicates what about the material?
The better that material is as a thermal insulator
Which materials are suggested as good thermal insulators?
- Bubble wrap
- Cotton wool
How does the thickness of the insulating material affect thermal insulation?
Thicker layers make better thermal insulators
Fill in the blank: The thicker the insulating layer, the ______ the temperature change of the water.
smaller
True or False: The experiment suggests that more energy is transferred with thicker insulating layers.
False
