convection

convection — noun

1. The movement of heat inside a liquid or a gas, which takes place as warmer fluid

1.名詞B2
釋義

The movement of heat inside a liquid or a gas, which takes place as warmer fluid rises upward and cooler fluid sinks downward.

例句

In the saucepan, convection made the soup at the bottom rise as it heated up.

natural process in a heated liquid

During summer, convection creates the strong winds that bring afternoon thunderstorms.

weather context: thunderstorm formation

同義詞
  • heat transfer

    broader term that includes conduction and radiation as well; convection is one specific type

反義詞
  • conduction

    transfers heat through direct contact in solids, not through fluid movement

用法筆記

Frequently used as a modifier in compound nouns such as 'convection oven' or 'convection current'. In science writing, often paired with 'conduction' and 'radiation' as the three main types of heat transfer.

常見錯誤

❌The heat spreads by conduction through the boiling water.
✅The heat spreads by convection through the boiling water.
💡Conduction transfers heat through solid materials, while convection transfers heat through fluids like water.
❌The hot air rises by convection current.
✅The hot air rises by convection.
💡'Convection current' is a related term but 'convection' alone already describes the process; avoid redundant phrasing.