CAIE IGCSE Physics Poor Conduction in Fluids
Practise explaining why gases and most liquids conduct poorly through wide particle spacing and infrequent collisions, then apply trapped air as insulation.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- link widely spaced gas particles to fewer collisions available for energy transfer
- apply trapped air as a poor conductor that reduces energy reaching a hand or surface
2.3.1.3—Describe, in terms of particles, why question 1
Fig. 5.1 shows two containers, each filled with hot water.
Fig. 5.1
The outer surface of the metal container is hot.
Explain, in terms of particles, why gases are poor thermal conductors compared to non-metal solids.
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