Question detail
During a practical investigation of thermal insulation, why is it important to keep the system closed?
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. To prevent the material from drying out
- B. To ensure no external heat enters or leaves the system
- C. To allow the material to expand freely
- D. To keep the experiment simple
Answer
To ensure no external heat enters or leaves the system
Explanation
The correct option is "To ensure no external heat enters or leaves the system". To ensure no external heat enters or leaves the system 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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