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CAIE IGCSE Physics Convection Question Bank

Practise recognising and explaining convection currents in liquids and gases through temperature, expansion, density changes, rising and replacement flow.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • identify convection as bulk thermal energy transfer through a moving liquid or gas
  • link heating to fluid expansion and lower density so warmer material rises
  • complete a circulation by showing cooler denser fluid sinking to replace it

Covered syllabus points

2.3.2.1—Convection is an important method of2.3.2.2—Convection in liquids and gases in

2.3.2 Convection question 1

[Maximum number: 4]

Fig. 4.1 shows a heater used to warm the air in a room.

Fig. 4.1

Fig. 4.1

Question (a)

(a)

State the main method of thermal energy transfer throughout the air in the room.

[ 1 ]

Question (b)

(b)

Explain how the heater warms all the air in the room.

[ 3 ]
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