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Last updated at 14:13 GMT, Thursday, 14 January 2010

Larks and owls

A girl sleeping

Are you a morning or an evening person?

Do you naturally wake up early or go to bed late? You might be biologically aligned to a different time zone. This week Dan and Kate discuss sleeping patterns and why some people are naturally early risers – larks – and some people are much better late at night – owls.

This week's question:

On average, how many hours do adults sleep each night?

a) six and a half hours
b) seven and a half hours
c) eight and a half hours

Listen out for the answer in the programme!

Listen to the programme

Larks and owls

Vocabulary from the programme

lark

a famously early-rising bird. People who wake up early in the morning are sometimes known as 'larks'

owl

a type of bird that tends to come out at night. People who stay up late are sometimes known as 'owls' or 'night-owls'

body clock

a person's natural rhythm of sleep

dawn

when the sun rises

dusk

when the sun goes down

internal

located inside

external

located outside

jet lag

the tiredness you feel after you've been on a flight

synchronised

happening at the same rate or speed

out of sync

happening at the wrong pace

End of Section

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