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# convection

noun (convection — uncountable)

«convection» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

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://mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/#m1)

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

## On Mova

- [Trees and pragmatics of «convection» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/convection/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«convection» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/convection.html) on Mova free.