Question detail
In a practical activity investigating thermal insulation, which variable should be kept constant to isolate the effect of material type?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Conservation and dissipation of energy
Question
- A. The ambient temperature
- B. The wall thickness
- C. The initial temperature of the material
- D. The colour of the material
Answer
The wall thickness
Explanation
The correct option is "The wall thickness". The wall thickness is right because it directly matches Energy transfers in a system: Required practical activity 2 (physics only): investigate factors that may affect thermal insulation properties.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Misunderstanding Thermal Insulation
Students often think that all materials are equally effective at insulating, without considering their thermal conductivity.
To fix this, students should investigate and compare the thermal conductivity of different materials, understanding that lower thermal conductivity indicates better insulation properties.
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