SC-1455
Convection
Lower Sec Science · Secondary 2 · Hard · Convection
A student mixes calcium oxide powder with water in a beaker. The temperature of the mixture rises from 26 °C to 41 °C. Which statement best explains how heat is transferred from the hot mixture to the cooler air above it?
- By convection, as warmer air above the mixture rises and cooler air sinks
- By conduction, as heat passes directly through the beaker walls only
- By radiation only, as heat travels without any particles
- By conduction, as hot water particles move upwards carrying heat
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