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# convection

«convection» in Mova's school dictionary: **the way heat moves through a liquid or a gas: the warm…** — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

### part of speech

noun (convection — uncountable)

### meaning for a pupil

Convection is the way heat moves through a liquid or a gas: the warm part rises and the cooler part sinks, making a current that goes round. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#m1)

### sense in the lessons

In science lessons convection is one of the three ways heat travels (conduction, convection, radiation). It explains why warm air rises, how radiators heat a room and how wind and sea currents form. Phrases: «convection current», «convection oven».

### examples

- Convection carries warm air up to the ceiling. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#x1)
- Hot water rises by convection in a pan. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#x2)
- A radiator heats a room by convection. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#x3)
- Draw arrows to show the convection current. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#x4)
- A convection oven has a fan to blow hot air around. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#x5)
- Sea breezes are caused by convection. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#x6)

### note

Uncountable. Compare: conduction (heat through solids by touching), radiation (heat travelling as rays, like from the Sun). Myth: «heat rises» — really, hot fluid rises because it is less dense.

### In the corpora

- [Convection carries heat with moving air or water: warm air rises and cool air sinks.](https://md.mova.elamur.ai/free/en/corpora/school/world/82-heat-and-temperature/6/)

### Trees and pragmatics

[Every meaning and example of «convection» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/), each sentence with its dependency tree and frames.