Thermal Energy Transfer
This practical lesson covers:
- How insulation thickness effects the rate of heat transfer
Investigating the insulating properties of different materials Aim: To investigate how insulation thickness effects the rate of heat transfer. |
Background information: Insulating a hot object reduces the rate of heat loss to the surroundings. In this practical lesson, you will insulate a container using an insulating material and record the temperature over time. You will then vary the number of insulation layers to determine the relationship between insulation thickness and energy transfer. |
Variables:
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What is the purpose of the cardboard lid in this experiment?
to prevent contamination of the water
to insulate the beaker
to prevent water spilling
to measure the temperature of the water
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Why is it important to repeat the experiment?
To collect less data
To test the reliability of the thermometer
To reduce the time required for the experiment
To ensure accuracy and consistency of results
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Why is it important that the starting temperature is the same each time the experiment is repeated?
a high temperature must be used to prevent the water freezing
the thermometer is more accurate at higher temperatures
the rate of cooling depends on temperature. For the experiment to be fair and valid, the temperature at the start should be the same each time
it is easier to measure temperature changes when the temperatures are high
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What is the purpose of the cardboard lid in the experiment?
To hold the thermometer
To cover the beaker or can
To keep the water warm
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How often should you record the temperature of the water?
Every five minutes
Every fifteen minutes
Every ten minutes
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What is the experiment trying to measure?
The temperature of the water
The rate of heat loss
The amount of insulation
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What will have the slowest rate of heat loss?
The beaker or can with the most insulation
The beaker or can with no insulation
The beaker or can with the least insulation
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